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<div class="section" id="module-datetime">
<span id="datetime-basic-date-and-time-types"></span><h1>8.1. <a class="reference internal" href="#module-datetime" title="datetime: Basic date and time types."><code class="xref py py-mod docutils literal notranslate"><span class="pre">datetime</span></code></a> — Basic date and time types<a class="headerlink" href="#module-datetime" title="本標題的永久連結">¶</a></h1>
<p><strong>Source code:</strong> <a class="reference external" href="https://github.com/python/cpython/tree/3.7/Lib/datetime.py">Lib/datetime.py</a></p>
<hr class="docutils" />
<p>The <a class="reference internal" href="#module-datetime" title="datetime: Basic date and time types."><code class="xref py py-mod docutils literal notranslate"><span class="pre">datetime</span></code></a> module supplies classes for manipulating dates and times in
both simple and complex ways. While date and time arithmetic is supported, the
focus of the implementation is on efficient attribute extraction for output
formatting and manipulation. For related functionality, see also the
<a class="reference internal" href="time.html#module-time" title="time: Time access and conversions."><code class="xref py py-mod docutils literal notranslate"><span class="pre">time</span></code></a> and <a class="reference internal" href="calendar.html#module-calendar" title="calendar: Functions for working with calendars, including some emulation of the Unix cal program."><code class="xref py py-mod docutils literal notranslate"><span class="pre">calendar</span></code></a> modules.</p>
<p>There are two kinds of date and time objects: 「naive」 and 「aware」.</p>
<p>An aware object has sufficient knowledge of applicable algorithmic and
political time adjustments, such as time zone and daylight saving time
information, to locate itself relative to other aware objects. An aware object
is used to represent a specific moment in time that is not open to
interpretation <a class="footnote-reference" href="#id2" id="id1">[1]</a>.</p>
<p>A naive object does not contain enough information to unambiguously locate
itself relative to other date/time objects. Whether a naive object represents
Coordinated Universal Time (UTC), local time, or time in some other timezone is
purely up to the program, just like it is up to the program whether a
particular number represents metres, miles, or mass. Naive objects are easy to
understand and to work with, at the cost of ignoring some aspects of reality.</p>
<p>For applications requiring aware objects, <a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> and <a class="reference internal" href="#datetime.time" title="datetime.time"><code class="xref py py-class docutils literal notranslate"><span class="pre">time</span></code></a>
objects have an optional time zone information attribute, <code class="xref py py-attr docutils literal notranslate"><span class="pre">tzinfo</span></code>, that
can be set to an instance of a subclass of the abstract <a class="reference internal" href="#datetime.tzinfo" title="datetime.tzinfo"><code class="xref py py-class docutils literal notranslate"><span class="pre">tzinfo</span></code></a> class.
These <a class="reference internal" href="#datetime.tzinfo" title="datetime.tzinfo"><code class="xref py py-class docutils literal notranslate"><span class="pre">tzinfo</span></code></a> objects capture information about the offset from UTC
time, the time zone name, and whether Daylight Saving Time is in effect. Note
that only one concrete <a class="reference internal" href="#datetime.tzinfo" title="datetime.tzinfo"><code class="xref py py-class docutils literal notranslate"><span class="pre">tzinfo</span></code></a> class, the <a class="reference internal" href="#datetime.timezone" title="datetime.timezone"><code class="xref py py-class docutils literal notranslate"><span class="pre">timezone</span></code></a> class, is
supplied by the <a class="reference internal" href="#module-datetime" title="datetime: Basic date and time types."><code class="xref py py-mod docutils literal notranslate"><span class="pre">datetime</span></code></a> module. The <a class="reference internal" href="#datetime.timezone" title="datetime.timezone"><code class="xref py py-class docutils literal notranslate"><span class="pre">timezone</span></code></a> class can
represent simple timezones with fixed offset from UTC, such as UTC itself or
North American EST and EDT timezones. Supporting timezones at deeper levels of
detail is up to the application. The rules for time adjustment across the
world are more political than rational, change frequently, and there is no
standard suitable for every application aside from UTC.</p>
<p>The <a class="reference internal" href="#module-datetime" title="datetime: Basic date and time types."><code class="xref py py-mod docutils literal notranslate"><span class="pre">datetime</span></code></a> module exports the following constants:</p>
<dl class="data">
<dt id="datetime.MINYEAR">
<code class="descclassname">datetime.</code><code class="descname">MINYEAR</code><a class="headerlink" href="#datetime.MINYEAR" title="本定義的永久連結">¶</a></dt>
<dd><p>The smallest year number allowed in a <a class="reference internal" href="#datetime.date" title="datetime.date"><code class="xref py py-class docutils literal notranslate"><span class="pre">date</span></code></a> or <a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> object.
<a class="reference internal" href="#datetime.MINYEAR" title="datetime.MINYEAR"><code class="xref py py-const docutils literal notranslate"><span class="pre">MINYEAR</span></code></a> is <code class="docutils literal notranslate"><span class="pre">1</span></code>.</p>
</dd></dl>
<dl class="data">
<dt id="datetime.MAXYEAR">
<code class="descclassname">datetime.</code><code class="descname">MAXYEAR</code><a class="headerlink" href="#datetime.MAXYEAR" title="本定義的永久連結">¶</a></dt>
<dd><p>The largest year number allowed in a <a class="reference internal" href="#datetime.date" title="datetime.date"><code class="xref py py-class docutils literal notranslate"><span class="pre">date</span></code></a> or <a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> object.
<a class="reference internal" href="#datetime.MAXYEAR" title="datetime.MAXYEAR"><code class="xref py py-const docutils literal notranslate"><span class="pre">MAXYEAR</span></code></a> is <code class="docutils literal notranslate"><span class="pre">9999</span></code>.</p>
</dd></dl>
<div class="admonition seealso">
<p class="first admonition-title">也參考</p>
<dl class="last docutils">
<dt>Module <a class="reference internal" href="calendar.html#module-calendar" title="calendar: Functions for working with calendars, including some emulation of the Unix cal program."><code class="xref py py-mod docutils literal notranslate"><span class="pre">calendar</span></code></a></dt>
<dd>General calendar related functions.</dd>
<dt>Module <a class="reference internal" href="time.html#module-time" title="time: Time access and conversions."><code class="xref py py-mod docutils literal notranslate"><span class="pre">time</span></code></a></dt>
<dd>Time access and conversions.</dd>
</dl>
</div>
<div class="section" id="available-types">
<h2>8.1.1. Available Types<a class="headerlink" href="#available-types" title="本標題的永久連結">¶</a></h2>
<dl class="class">
<dt>
<em class="property">class </em><code class="descclassname">datetime.</code><code class="descname">date</code></dt>
<dd><p>An idealized naive date, assuming the current Gregorian calendar always was, and
always will be, in effect. Attributes: <a class="reference internal" href="#datetime.date.year" title="datetime.date.year"><code class="xref py py-attr docutils literal notranslate"><span class="pre">year</span></code></a>, <a class="reference internal" href="#datetime.date.month" title="datetime.date.month"><code class="xref py py-attr docutils literal notranslate"><span class="pre">month</span></code></a>, and
<a class="reference internal" href="#datetime.date.day" title="datetime.date.day"><code class="xref py py-attr docutils literal notranslate"><span class="pre">day</span></code></a>.</p>
</dd></dl>
<dl class="class">
<dt>
<em class="property">class </em><code class="descclassname">datetime.</code><code class="descname">time</code></dt>
<dd><p>An idealized time, independent of any particular day, assuming that every day
has exactly 24*60*60 seconds (there is no notion of 「leap seconds」 here).
Attributes: <a class="reference internal" href="#datetime.time.hour" title="datetime.time.hour"><code class="xref py py-attr docutils literal notranslate"><span class="pre">hour</span></code></a>, <a class="reference internal" href="#datetime.time.minute" title="datetime.time.minute"><code class="xref py py-attr docutils literal notranslate"><span class="pre">minute</span></code></a>, <a class="reference internal" href="#datetime.time.second" title="datetime.time.second"><code class="xref py py-attr docutils literal notranslate"><span class="pre">second</span></code></a>, <a class="reference internal" href="#datetime.time.microsecond" title="datetime.time.microsecond"><code class="xref py py-attr docutils literal notranslate"><span class="pre">microsecond</span></code></a>,
and <a class="reference internal" href="#datetime.time.tzinfo" title="datetime.time.tzinfo"><code class="xref py py-attr docutils literal notranslate"><span class="pre">tzinfo</span></code></a>.</p>
</dd></dl>
<dl class="class">
<dt>
<em class="property">class </em><code class="descclassname">datetime.</code><code class="descname">datetime</code></dt>
<dd><p>A combination of a date and a time. Attributes: <a class="reference internal" href="#datetime.datetime.year" title="datetime.datetime.year"><code class="xref py py-attr docutils literal notranslate"><span class="pre">year</span></code></a>, <a class="reference internal" href="#datetime.datetime.month" title="datetime.datetime.month"><code class="xref py py-attr docutils literal notranslate"><span class="pre">month</span></code></a>,
<a class="reference internal" href="#datetime.datetime.day" title="datetime.datetime.day"><code class="xref py py-attr docutils literal notranslate"><span class="pre">day</span></code></a>, <a class="reference internal" href="#datetime.datetime.hour" title="datetime.datetime.hour"><code class="xref py py-attr docutils literal notranslate"><span class="pre">hour</span></code></a>, <a class="reference internal" href="#datetime.datetime.minute" title="datetime.datetime.minute"><code class="xref py py-attr docutils literal notranslate"><span class="pre">minute</span></code></a>, <a class="reference internal" href="#datetime.datetime.second" title="datetime.datetime.second"><code class="xref py py-attr docutils literal notranslate"><span class="pre">second</span></code></a>, <a class="reference internal" href="#datetime.datetime.microsecond" title="datetime.datetime.microsecond"><code class="xref py py-attr docutils literal notranslate"><span class="pre">microsecond</span></code></a>,
and <a class="reference internal" href="#datetime.datetime.tzinfo" title="datetime.datetime.tzinfo"><code class="xref py py-attr docutils literal notranslate"><span class="pre">tzinfo</span></code></a>.</p>
</dd></dl>
<dl class="class">
<dt>
<em class="property">class </em><code class="descclassname">datetime.</code><code class="descname">timedelta</code></dt>
<dd><p>A duration expressing the difference between two <a class="reference internal" href="#datetime.date" title="datetime.date"><code class="xref py py-class docutils literal notranslate"><span class="pre">date</span></code></a>, <a class="reference internal" href="#datetime.time" title="datetime.time"><code class="xref py py-class docutils literal notranslate"><span class="pre">time</span></code></a>,
or <a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> instances to microsecond resolution.</p>
</dd></dl>
<dl class="class">
<dt>
<em class="property">class </em><code class="descclassname">datetime.</code><code class="descname">tzinfo</code></dt>
<dd><p>An abstract base class for time zone information objects. These are used by the
<a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> and <a class="reference internal" href="#datetime.time" title="datetime.time"><code class="xref py py-class docutils literal notranslate"><span class="pre">time</span></code></a> classes to provide a customizable notion of
time adjustment (for example, to account for time zone and/or daylight saving
time).</p>
</dd></dl>
<dl class="class">
<dt>
<em class="property">class </em><code class="descclassname">datetime.</code><code class="descname">timezone</code></dt>
<dd><p>A class that implements the <a class="reference internal" href="#datetime.tzinfo" title="datetime.tzinfo"><code class="xref py py-class docutils literal notranslate"><span class="pre">tzinfo</span></code></a> abstract base class as a
fixed offset from the UTC.</p>
<div class="versionadded">
<p><span class="versionmodified">3.2 版新加入.</span></p>
</div>
</dd></dl>
<p>Objects of these types are immutable.</p>
<p>Objects of the <a class="reference internal" href="#datetime.date" title="datetime.date"><code class="xref py py-class docutils literal notranslate"><span class="pre">date</span></code></a> type are always naive.</p>
<p>An object of type <a class="reference internal" href="#datetime.time" title="datetime.time"><code class="xref py py-class docutils literal notranslate"><span class="pre">time</span></code></a> or <a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> may be naive or aware.
A <a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> object <em>d</em> is aware if <code class="docutils literal notranslate"><span class="pre">d.tzinfo</span></code> is not <code class="docutils literal notranslate"><span class="pre">None</span></code> and
<code class="docutils literal notranslate"><span class="pre">d.tzinfo.utcoffset(d)</span></code> does not return <code class="docutils literal notranslate"><span class="pre">None</span></code>. If <code class="docutils literal notranslate"><span class="pre">d.tzinfo</span></code> is
<code class="docutils literal notranslate"><span class="pre">None</span></code>, or if <code class="docutils literal notranslate"><span class="pre">d.tzinfo</span></code> is not <code class="docutils literal notranslate"><span class="pre">None</span></code> but <code class="docutils literal notranslate"><span class="pre">d.tzinfo.utcoffset(d)</span></code>
returns <code class="docutils literal notranslate"><span class="pre">None</span></code>, <em>d</em> is naive. A <a class="reference internal" href="#datetime.time" title="datetime.time"><code class="xref py py-class docutils literal notranslate"><span class="pre">time</span></code></a> object <em>t</em> is aware
if <code class="docutils literal notranslate"><span class="pre">t.tzinfo</span></code> is not <code class="docutils literal notranslate"><span class="pre">None</span></code> and <code class="docutils literal notranslate"><span class="pre">t.tzinfo.utcoffset(None)</span></code> does not return
<code class="docutils literal notranslate"><span class="pre">None</span></code>. Otherwise, <em>t</em> is naive.</p>
<p>The distinction between naive and aware doesn’t apply to <a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a>
objects.</p>
<p>Subclass relationships:</p>
<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="nb">object</span>
<span class="n">timedelta</span>
<span class="n">tzinfo</span>
<span class="n">timezone</span>
<span class="n">time</span>
<span class="n">date</span>
<span class="n">datetime</span>
</pre></div>
</div>
</div>
<div class="section" id="timedelta-objects">
<span id="datetime-timedelta"></span><h2>8.1.2. <a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a> Objects<a class="headerlink" href="#timedelta-objects" title="本標題的永久連結">¶</a></h2>
<p>A <a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a> object represents a duration, the difference between two
dates or times.</p>
<dl class="class">
<dt id="datetime.timedelta">
<em class="property">class </em><code class="descclassname">datetime.</code><code class="descname">timedelta</code><span class="sig-paren">(</span><em>days=0</em>, <em>seconds=0</em>, <em>microseconds=0</em>, <em>milliseconds=0</em>, <em>minutes=0</em>, <em>hours=0</em>, <em>weeks=0</em><span class="sig-paren">)</span><a class="headerlink" href="#datetime.timedelta" title="本定義的永久連結">¶</a></dt>
<dd><p>All arguments are optional and default to <code class="docutils literal notranslate"><span class="pre">0</span></code>. Arguments may be integers
or floats, and may be positive or negative.</p>
<p>Only <em>days</em>, <em>seconds</em> and <em>microseconds</em> are stored internally. Arguments are
converted to those units:</p>
<ul class="simple">
<li>A millisecond is converted to 1000 microseconds.</li>
<li>A minute is converted to 60 seconds.</li>
<li>An hour is converted to 3600 seconds.</li>
<li>A week is converted to 7 days.</li>
</ul>
<p>and days, seconds and microseconds are then normalized so that the
representation is unique, with</p>
<ul class="simple">
<li><code class="docutils literal notranslate"><span class="pre">0</span> <span class="pre"><=</span> <span class="pre">microseconds</span> <span class="pre"><</span> <span class="pre">1000000</span></code></li>
<li><code class="docutils literal notranslate"><span class="pre">0</span> <span class="pre"><=</span> <span class="pre">seconds</span> <span class="pre"><</span> <span class="pre">3600*24</span></code> (the number of seconds in one day)</li>
<li><code class="docutils literal notranslate"><span class="pre">-999999999</span> <span class="pre"><=</span> <span class="pre">days</span> <span class="pre"><=</span> <span class="pre">999999999</span></code></li>
</ul>
<p>If any argument is a float and there are fractional microseconds,
the fractional microseconds left over from all arguments are
combined and their sum is rounded to the nearest microsecond using
round-half-to-even tiebreaker. If no argument is a float, the
conversion and normalization processes are exact (no information is
lost).</p>
<p>If the normalized value of days lies outside the indicated range,
<a class="reference internal" href="exceptions.html#OverflowError" title="OverflowError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OverflowError</span></code></a> is raised.</p>
<p>Note that normalization of negative values may be surprising at first. For
example,</p>
<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">from</span> <span class="nn">datetime</span> <span class="k">import</span> <span class="n">timedelta</span>
<span class="gp">>>> </span><span class="n">d</span> <span class="o">=</span> <span class="n">timedelta</span><span class="p">(</span><span class="n">microseconds</span><span class="o">=-</span><span class="mi">1</span><span class="p">)</span>
<span class="gp">>>> </span><span class="p">(</span><span class="n">d</span><span class="o">.</span><span class="n">days</span><span class="p">,</span> <span class="n">d</span><span class="o">.</span><span class="n">seconds</span><span class="p">,</span> <span class="n">d</span><span class="o">.</span><span class="n">microseconds</span><span class="p">)</span>
<span class="go">(-1, 86399, 999999)</span>
</pre></div>
</div>
</dd></dl>
<p>Class attributes are:</p>
<dl class="attribute">
<dt id="datetime.timedelta.min">
<code class="descclassname">timedelta.</code><code class="descname">min</code><a class="headerlink" href="#datetime.timedelta.min" title="本定義的永久連結">¶</a></dt>
<dd><p>The most negative <a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a> object, <code class="docutils literal notranslate"><span class="pre">timedelta(-999999999)</span></code>.</p>
</dd></dl>
<dl class="attribute">
<dt id="datetime.timedelta.max">
<code class="descclassname">timedelta.</code><code class="descname">max</code><a class="headerlink" href="#datetime.timedelta.max" title="本定義的永久連結">¶</a></dt>
<dd><p>The most positive <a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a> object, <code class="docutils literal notranslate"><span class="pre">timedelta(days=999999999,</span>
<span class="pre">hours=23,</span> <span class="pre">minutes=59,</span> <span class="pre">seconds=59,</span> <span class="pre">microseconds=999999)</span></code>.</p>
</dd></dl>
<dl class="attribute">
<dt id="datetime.timedelta.resolution">
<code class="descclassname">timedelta.</code><code class="descname">resolution</code><a class="headerlink" href="#datetime.timedelta.resolution" title="本定義的永久連結">¶</a></dt>
<dd><p>The smallest possible difference between non-equal <a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a> objects,
<code class="docutils literal notranslate"><span class="pre">timedelta(microseconds=1)</span></code>.</p>
</dd></dl>
<p>Note that, because of normalization, <code class="docutils literal notranslate"><span class="pre">timedelta.max</span></code> > <code class="docutils literal notranslate"><span class="pre">-timedelta.min</span></code>.
<code class="docutils literal notranslate"><span class="pre">-timedelta.max</span></code> is not representable as a <a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a> object.</p>
<p>Instance attributes (read-only):</p>
<table border="1" class="docutils">
<colgroup>
<col width="29%" />
<col width="71%" />
</colgroup>
<thead valign="bottom">
<tr class="row-odd"><th class="head">Attribute</th>
<th class="head">Value</th>
</tr>
</thead>
<tbody valign="top">
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">days</span></code></td>
<td>Between -999999999 and 999999999 inclusive</td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">seconds</span></code></td>
<td>Between 0 and 86399 inclusive</td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">microseconds</span></code></td>
<td>Between 0 and 999999 inclusive</td>
</tr>
</tbody>
</table>
<p>Supported operations:</p>
<table border="1" class="docutils">
<colgroup>
<col width="41%" />
<col width="59%" />
</colgroup>
<thead valign="bottom">
<tr class="row-odd"><th class="head">Operation</th>
<th class="head">Result</th>
</tr>
</thead>
<tbody valign="top">
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">t1</span> <span class="pre">=</span> <span class="pre">t2</span> <span class="pre">+</span> <span class="pre">t3</span></code></td>
<td>Sum of <em>t2</em> and <em>t3</em>. Afterwards <em>t1</em>-<em>t2</em> ==
<em>t3</em> and <em>t1</em>-<em>t3</em> == <em>t2</em> are true. (1)</td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">t1</span> <span class="pre">=</span> <span class="pre">t2</span> <span class="pre">-</span> <span class="pre">t3</span></code></td>
<td>Difference of <em>t2</em> and <em>t3</em>. Afterwards <em>t1</em>
== <em>t2</em> - <em>t3</em> and <em>t2</em> == <em>t1</em> + <em>t3</em> are
true. (1)(6)</td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">t1</span> <span class="pre">=</span> <span class="pre">t2</span> <span class="pre">*</span> <span class="pre">i</span> <span class="pre">or</span> <span class="pre">t1</span> <span class="pre">=</span> <span class="pre">i</span> <span class="pre">*</span> <span class="pre">t2</span></code></td>
<td>Delta multiplied by an integer.
Afterwards <em>t1</em> // i == <em>t2</em> is true,
provided <code class="docutils literal notranslate"><span class="pre">i</span> <span class="pre">!=</span> <span class="pre">0</span></code>.</td>
</tr>
<tr class="row-odd"><td> </td>
<td>In general, <em>t1</em> * i == <em>t1</em> * (i-1) + <em>t1</em>
is true. (1)</td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">t1</span> <span class="pre">=</span> <span class="pre">t2</span> <span class="pre">*</span> <span class="pre">f</span> <span class="pre">or</span> <span class="pre">t1</span> <span class="pre">=</span> <span class="pre">f</span> <span class="pre">*</span> <span class="pre">t2</span></code></td>
<td>Delta multiplied by a float. The result is
rounded to the nearest multiple of
timedelta.resolution using round-half-to-even.</td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">f</span> <span class="pre">=</span> <span class="pre">t2</span> <span class="pre">/</span> <span class="pre">t3</span></code></td>
<td>Division (3) of <em>t2</em> by <em>t3</em>. Returns a
<a class="reference internal" href="functions.html#float" title="float"><code class="xref py py-class docutils literal notranslate"><span class="pre">float</span></code></a> object.</td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">t1</span> <span class="pre">=</span> <span class="pre">t2</span> <span class="pre">/</span> <span class="pre">f</span> <span class="pre">or</span> <span class="pre">t1</span> <span class="pre">=</span> <span class="pre">t2</span> <span class="pre">/</span> <span class="pre">i</span></code></td>
<td>Delta divided by a float or an int. The result
is rounded to the nearest multiple of
timedelta.resolution using round-half-to-even.</td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">t1</span> <span class="pre">=</span> <span class="pre">t2</span> <span class="pre">//</span> <span class="pre">i</span></code> or
<code class="docutils literal notranslate"><span class="pre">t1</span> <span class="pre">=</span> <span class="pre">t2</span> <span class="pre">//</span> <span class="pre">t3</span></code></td>
<td>The floor is computed and the remainder (if
any) is thrown away. In the second case, an
integer is returned. (3)</td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">t1</span> <span class="pre">=</span> <span class="pre">t2</span> <span class="pre">%</span> <span class="pre">t3</span></code></td>
<td>The remainder is computed as a
<a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a> object. (3)</td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">q,</span> <span class="pre">r</span> <span class="pre">=</span> <span class="pre">divmod(t1,</span> <span class="pre">t2)</span></code></td>
<td>Computes the quotient and the remainder:
<code class="docutils literal notranslate"><span class="pre">q</span> <span class="pre">=</span> <span class="pre">t1</span> <span class="pre">//</span> <span class="pre">t2</span></code> (3) and <code class="docutils literal notranslate"><span class="pre">r</span> <span class="pre">=</span> <span class="pre">t1</span> <span class="pre">%</span> <span class="pre">t2</span></code>.
q is an integer and r is a <a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a>
object.</td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">+t1</span></code></td>
<td>Returns a <a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a> object with the
same value. (2)</td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">-t1</span></code></td>
<td>equivalent to <a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a>(-<em>t1.days</em>, -<em>t1.seconds</em>,
-<em>t1.microseconds</em>), and to <em>t1</em>* -1. (1)(4)</td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">abs(t)</span></code></td>
<td>equivalent to +<em>t</em> when <code class="docutils literal notranslate"><span class="pre">t.days</span> <span class="pre">>=</span> <span class="pre">0</span></code>, and
to -<em>t</em> when <code class="docutils literal notranslate"><span class="pre">t.days</span> <span class="pre"><</span> <span class="pre">0</span></code>. (2)</td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">str(t)</span></code></td>
<td>Returns a string in the form
<code class="docutils literal notranslate"><span class="pre">[D</span> <span class="pre">day[s],</span> <span class="pre">][H]H:MM:SS[.UUUUUU]</span></code>, where D
is negative for negative <code class="docutils literal notranslate"><span class="pre">t</span></code>. (5)</td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">repr(t)</span></code></td>
<td>Returns a string representation of the
<a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a> object as a constructor
call with canonical attribute values.</td>
</tr>
</tbody>
</table>
<p>註解：</p>
<ol class="arabic">
<li><p class="first">This is exact, but may overflow.</p>
</li>
<li><p class="first">This is exact, and cannot overflow.</p>
</li>
<li><p class="first">Division by 0 raises <a class="reference internal" href="exceptions.html#ZeroDivisionError" title="ZeroDivisionError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">ZeroDivisionError</span></code></a>.</p>
</li>
<li><p class="first">-<em>timedelta.max</em> is not representable as a <a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a> object.</p>
</li>
<li><p class="first">String representations of <a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a> objects are normalized
similarly to their internal representation. This leads to somewhat
unusual results for negative timedeltas. For example:</p>
<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="n">timedelta</span><span class="p">(</span><span class="n">hours</span><span class="o">=-</span><span class="mi">5</span><span class="p">)</span>
<span class="go">datetime.timedelta(days=-1, seconds=68400)</span>
<span class="gp">>>> </span><span class="nb">print</span><span class="p">(</span><span class="n">_</span><span class="p">)</span>
<span class="go">-1 day, 19:00:00</span>
</pre></div>
</div>
</li>
<li><p class="first">The expression <code class="docutils literal notranslate"><span class="pre">t2</span> <span class="pre">-</span> <span class="pre">t3</span></code> will always be equal to the expression <code class="docutils literal notranslate"><span class="pre">t2</span> <span class="pre">+</span> <span class="pre">(-t3)</span></code> except
when t3 is equal to <code class="docutils literal notranslate"><span class="pre">timedelta.max</span></code>; in that case the former will produce a result
while the latter will overflow.</p>
</li>
</ol>
<p>In addition to the operations listed above <a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a> objects support
certain additions and subtractions with <a class="reference internal" href="#datetime.date" title="datetime.date"><code class="xref py py-class docutils literal notranslate"><span class="pre">date</span></code></a> and <a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a>
objects (see below).</p>
<div class="versionchanged">
<p><span class="versionmodified">3.2 版更變: </span>Floor division and true division of a <a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a> object by another
<a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a> object are now supported, as are remainder operations and
the <a class="reference internal" href="functions.html#divmod" title="divmod"><code class="xref py py-func docutils literal notranslate"><span class="pre">divmod()</span></code></a> function. True division and multiplication of a
<a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a> object by a <a class="reference internal" href="functions.html#float" title="float"><code class="xref py py-class docutils literal notranslate"><span class="pre">float</span></code></a> object are now supported.</p>
</div>
<p>Comparisons of <a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a> objects are supported with the
<a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a> object representing the smaller duration considered to be the
smaller timedelta. In order to stop mixed-type comparisons from falling back to
the default comparison by object address, when a <a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a> object is
compared to an object of a different type, <a class="reference internal" href="exceptions.html#TypeError" title="TypeError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">TypeError</span></code></a> is raised unless the
comparison is <code class="docutils literal notranslate"><span class="pre">==</span></code> or <code class="docutils literal notranslate"><span class="pre">!=</span></code>. The latter cases return <a class="reference internal" href="constants.html#False" title="False"><code class="xref py py-const docutils literal notranslate"><span class="pre">False</span></code></a> or
<a class="reference internal" href="constants.html#True" title="True"><code class="xref py py-const docutils literal notranslate"><span class="pre">True</span></code></a>, respectively.</p>
<p><a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a> objects are <a class="reference internal" href="../glossary.html#term-hashable"><span class="xref std std-term">hashable</span></a> (usable as dictionary keys), support
efficient pickling, and in Boolean contexts, a <a class="reference internal" href="#datetime.timedelta" title="datetime.timedelta"><code class="xref py py-class docutils literal notranslate"><span class="pre">timedelta</span></code></a> object is
considered to be true if and only if it isn’t equal to <code class="docutils literal notranslate"><span class="pre">timedelta(0)</span></code>.</p>
<p>Instance methods:</p>
<dl class="method">
<dt id="datetime.timedelta.total_seconds">
<code class="descclassname">timedelta.</code><code class="descname">total_seconds</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#datetime.timedelta.total_seconds" title="本定義的永久連結">¶</a></dt>
<dd><p>Return the total number of seconds contained in the duration. Equivalent to
<code class="docutils literal notranslate"><span class="pre">td</span> <span class="pre">/</span> <span class="pre">timedelta(seconds=1)</span></code>.</p>
<p>Note that for very large time intervals (greater than 270 years on
most platforms) this method will lose microsecond accuracy.</p>
<div class="versionadded">
<p><span class="versionmodified">3.2 版新加入.</span></p>
</div>
</dd></dl>
<p>Example usage:</p>
<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">from</span> <span class="nn">datetime</span> <span class="k">import</span> <span class="n">timedelta</span>
<span class="gp">>>> </span><span class="n">year</span> <span class="o">=</span> <span class="n">timedelta</span><span class="p">(</span><span class="n">days</span><span class="o">=</span><span class="mi">365</span><span class="p">)</span>
<span class="gp">>>> </span><span class="n">another_year</span> <span class="o">=</span> <span class="n">timedelta</span><span class="p">(</span><span class="n">weeks</span><span class="o">=</span><span class="mi">40</span><span class="p">,</span> <span class="n">days</span><span class="o">=</span><span class="mi">84</span><span class="p">,</span> <span class="n">hours</span><span class="o">=</span><span class="mi">23</span><span class="p">,</span>
<span class="gp">... </span> <span class="n">minutes</span><span class="o">=</span><span class="mi">50</span><span class="p">,</span> <span class="n">seconds</span><span class="o">=</span><span class="mi">600</span><span class="p">)</span> <span class="c1"># adds up to 365 days</span>
<span class="gp">>>> </span><span class="n">year</span><span class="o">.</span><span class="n">total_seconds</span><span class="p">()</span>
<span class="go">31536000.0</span>
<span class="gp">>>> </span><span class="n">year</span> <span class="o">==</span> <span class="n">another_year</span>
<span class="go">True</span>
<span class="gp">>>> </span><span class="n">ten_years</span> <span class="o">=</span> <span class="mi">10</span> <span class="o">*</span> <span class="n">year</span>
<span class="gp">>>> </span><span class="n">ten_years</span><span class="p">,</span> <span class="n">ten_years</span><span class="o">.</span><span class="n">days</span> <span class="o">//</span> <span class="mi">365</span>
<span class="go">(datetime.timedelta(days=3650), 10)</span>
<span class="gp">>>> </span><span class="n">nine_years</span> <span class="o">=</span> <span class="n">ten_years</span> <span class="o">-</span> <span class="n">year</span>
<span class="gp">>>> </span><span class="n">nine_years</span><span class="p">,</span> <span class="n">nine_years</span><span class="o">.</span><span class="n">days</span> <span class="o">//</span> <span class="mi">365</span>
<span class="go">(datetime.timedelta(days=3285), 9)</span>
<span class="gp">>>> </span><span class="n">three_years</span> <span class="o">=</span> <span class="n">nine_years</span> <span class="o">//</span> <span class="mi">3</span>
<span class="gp">>>> </span><span class="n">three_years</span><span class="p">,</span> <span class="n">three_years</span><span class="o">.</span><span class="n">days</span> <span class="o">//</span> <span class="mi">365</span>
<span class="go">(datetime.timedelta(days=1095), 3)</span>
<span class="gp">>>> </span><span class="nb">abs</span><span class="p">(</span><span class="n">three_years</span> <span class="o">-</span> <span class="n">ten_years</span><span class="p">)</span> <span class="o">==</span> <span class="mi">2</span> <span class="o">*</span> <span class="n">three_years</span> <span class="o">+</span> <span class="n">year</span>
<span class="go">True</span>
</pre></div>
</div>
</div>
<div class="section" id="date-objects">
<span id="datetime-date"></span><h2>8.1.3. <a class="reference internal" href="#datetime.date" title="datetime.date"><code class="xref py py-class docutils literal notranslate"><span class="pre">date</span></code></a> Objects<a class="headerlink" href="#date-objects" title="本標題的永久連結">¶</a></h2>
<p>A <a class="reference internal" href="#datetime.date" title="datetime.date"><code class="xref py py-class docutils literal notranslate"><span class="pre">date</span></code></a> object represents a date (year, month and day) in an idealized
calendar, the current Gregorian calendar indefinitely extended in both
directions. January 1 of year 1 is called day number 1, January 2 of year 1 is
called day number 2, and so on. This matches the definition of the 「proleptic
Gregorian」 calendar in Dershowitz and Reingold’s book Calendrical Calculations,
where it’s the base calendar for all computations. See the book for algorithms
for converting between proleptic Gregorian ordinals and many other calendar
systems.</p>
<dl class="class">
<dt id="datetime.date">
<em class="property">class </em><code class="descclassname">datetime.</code><code class="descname">date</code><span class="sig-paren">(</span><em>year</em>, <em>month</em>, <em>day</em><span class="sig-paren">)</span><a class="headerlink" href="#datetime.date" title="本定義的永久連結">¶</a></dt>
<dd><p>All arguments are required. Arguments may be integers, in the following
ranges:</p>
<ul class="simple">
<li><code class="docutils literal notranslate"><span class="pre">MINYEAR</span> <span class="pre"><=</span> <span class="pre">year</span> <span class="pre"><=</span> <span class="pre">MAXYEAR</span></code></li>
<li><code class="docutils literal notranslate"><span class="pre">1</span> <span class="pre"><=</span> <span class="pre">month</span> <span class="pre"><=</span> <span class="pre">12</span></code></li>
<li><code class="docutils literal notranslate"><span class="pre">1</span> <span class="pre"><=</span> <span class="pre">day</span> <span class="pre"><=</span> <span class="pre">number</span> <span class="pre">of</span> <span class="pre">days</span> <span class="pre">in</span> <span class="pre">the</span> <span class="pre">given</span> <span class="pre">month</span> <span class="pre">and</span> <span class="pre">year</span></code></li>
</ul>
<p>If an argument outside those ranges is given, <a class="reference internal" href="exceptions.html#ValueError" title="ValueError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">ValueError</span></code></a> is raised.</p>
</dd></dl>
<p>Other constructors, all class methods:</p>
<dl class="classmethod">
<dt id="datetime.date.today">
<em class="property">classmethod </em><code class="descclassname">date.</code><code class="descname">today</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#datetime.date.today" title="本定義的永久連結">¶</a></dt>
<dd><p>Return the current local date. This is equivalent to
<code class="docutils literal notranslate"><span class="pre">date.fromtimestamp(time.time())</span></code>.</p>
</dd></dl>
<dl class="classmethod">
<dt id="datetime.date.fromtimestamp">
<em class="property">classmethod </em><code class="descclassname">date.</code><code class="descname">fromtimestamp</code><span class="sig-paren">(</span><em>timestamp</em><span class="sig-paren">)</span><a class="headerlink" href="#datetime.date.fromtimestamp" title="本定義的永久連結">¶</a></dt>
<dd><p>Return the local date corresponding to the POSIX timestamp, such as is returned
by <a class="reference internal" href="time.html#time.time" title="time.time"><code class="xref py py-func docutils literal notranslate"><span class="pre">time.time()</span></code></a>. This may raise <a class="reference internal" href="exceptions.html#OverflowError" title="OverflowError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OverflowError</span></code></a>, if the timestamp is out
of the range of values supported by the platform C <code class="xref c c-func docutils literal notranslate"><span class="pre">localtime()</span></code> function,
and <a class="reference internal" href="exceptions.html#OSError" title="OSError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OSError</span></code></a> on <code class="xref c c-func docutils literal notranslate"><span class="pre">localtime()</span></code> failure.
It’s common for this to be restricted to years from 1970 through 2038. Note
that on non-POSIX systems that include leap seconds in their notion of a
timestamp, leap seconds are ignored by <a class="reference internal" href="#datetime.date.fromtimestamp" title="datetime.date.fromtimestamp"><code class="xref py py-meth docutils literal notranslate"><span class="pre">fromtimestamp()</span></code></a>.</p>
<div class="versionchanged">
<p><span class="versionmodified">3.3 版更變: </span>Raise <a class="reference internal" href="exceptions.html#OverflowError" title="OverflowError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OverflowError</span></code></a> instead of <a class="reference internal" href="exceptions.html#ValueError" title="ValueError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">ValueError</span></code></a> if the timestamp
is out of the range of values supported by the platform C
<code class="xref c c-func docutils literal notranslate"><span class="pre">localtime()</span></code> function. Raise <a class="reference internal" href="exceptions.html#OSError" title="OSError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OSError</span></code></a> instead of
<a class="reference internal" href="exceptions.html#ValueError" title="ValueError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">ValueError</span></code></a> on <code class="xref c c-func docutils literal notranslate"><span class="pre">localtime()</span></code> failure.</p>
</div>
</dd></dl>
<dl class="classmethod">
<dt id="datetime.date.fromordinal">
<em class="property">classmethod </em><code class="descclassname">date.</code><code class="descname">fromordinal</code><span class="sig-paren">(</span><em>ordinal</em><span class="sig-paren">)</span><a class="headerlink" href="#datetime.date.fromordinal" title="本定義的永久連結">¶</a></dt>
<dd><p>Return the date corresponding to the proleptic Gregorian ordinal, where January
1 of year 1 has ordinal 1. <a class="reference internal" href="exceptions.html#ValueError" title="ValueError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">ValueError</span></code></a> is raised unless <code class="docutils literal notranslate"><span class="pre">1</span> <span class="pre"><=</span> <span class="pre">ordinal</span> <span class="pre"><=</span>
<span class="pre">date.max.toordinal()</span></code>. For any date <em>d</em>, <code class="docutils literal notranslate"><span class="pre">date.fromordinal(d.toordinal())</span> <span class="pre">==</span>
<span class="pre">d</span></code>.</p>
</dd></dl>
<dl class="classmethod">
<dt id="datetime.date.fromisoformat">
<em class="property">classmethod </em><code class="descclassname">date.</code><code class="descname">fromisoformat</code><span class="sig-paren">(</span><em>date_string</em><span class="sig-paren">)</span><a class="headerlink" href="#datetime.date.fromisoformat" title="本定義的永久連結">¶</a></dt>
<dd><p>Return a <a class="reference internal" href="#datetime.date" title="datetime.date"><code class="xref py py-class docutils literal notranslate"><span class="pre">date</span></code></a> corresponding to a <em>date_string</em> in the format emitted
by <a class="reference internal" href="#datetime.date.isoformat" title="datetime.date.isoformat"><code class="xref py py-meth docutils literal notranslate"><span class="pre">date.isoformat()</span></code></a>. Specifically, this function supports strings in
the format(s) <code class="docutils literal notranslate"><span class="pre">YYYY-MM-DD</span></code>.</p>
<div class="admonition caution">
<p class="first admonition-title">警示</p>
<p class="last">This does not support parsing arbitrary ISO 8601 strings - it is only intended
as the inverse operation of <a class="reference internal" href="#datetime.date.isoformat" title="datetime.date.isoformat"><code class="xref py py-meth docutils literal notranslate"><span class="pre">date.isoformat()</span></code></a>.</p>
</div>
<div class="versionadded">
<p><span class="versionmodified">3.7 版新加入.</span></p>
</div>
</dd></dl>
<p>Class attributes:</p>
<dl class="attribute">
<dt id="datetime.date.min">
<code class="descclassname">date.</code><code class="descname">min</code><a class="headerlink" href="#datetime.date.min" title="本定義的永久連結">¶</a></dt>
<dd><p>The earliest representable date, <code class="docutils literal notranslate"><span class="pre">date(MINYEAR,</span> <span class="pre">1,</span> <span class="pre">1)</span></code>.</p>
</dd></dl>
<dl class="attribute">
<dt id="datetime.date.max">
<code class="descclassname">date.</code><code class="descname">max</code><a class="headerlink" href="#datetime.date.max" title="本定義的永久連結">¶</a></dt>
<dd><p>The latest representable date, <code class="docutils literal notranslate"><span class="pre">date(MAXYEAR,</span> <span class="pre">12,</span> <span class="pre">31)</span></code>.</p>
</dd></dl>
<dl class="attribute">
<dt id="datetime.date.resolution">
<code class="descclassname">date.</code><code class="descname">resolution</code><a class="headerlink" href="#datetime.date.resolution" title="本定義的永久連結">¶</a></dt>
<dd><p>The smallest possible difference between non-equal date objects,
<code class="docutils literal notranslate"><span class="pre">timedelta(days=1)</span></code>.</p>
</dd></dl>
<p>Instance attributes (read-only):</p>
<dl class="attribute">
<dt id="datetime.date.year">
<code class="descclassname">date.</code><code class="descname">year</code><a class="headerlink" href="#datetime.date.year" title="本定義的永久連結">¶</a></dt>
<dd><p>Between <a class="reference internal" href="#datetime.MINYEAR" title="datetime.MINYEAR"><code class="xref py py-const docutils literal notranslate"><span class="pre">MINYEAR</span></code></a> and <a class="reference internal" href="#datetime.MAXYEAR" title="datetime.MAXYEAR"><code class="xref py py-const docutils literal notranslate"><span class="pre">MAXYEAR</span></code></a> inclusive.</p>
</dd></dl>
<dl class="attribute">
<dt id="datetime.date.month">
<code class="descclassname">date.</code><code class="descname">month</code><a class="headerlink" href="#datetime.date.month" title="本定義的永久連結">¶</a></dt>
<dd><p>Between 1 and 12 inclusive.</p>
</dd></dl>
<dl class="attribute">
<dt id="datetime.date.day">
<code class="descclassname">date.</code><code class="descname">day</code><a class="headerlink" href="#datetime.date.day" title="本定義的永久連結">¶</a></dt>
<dd><p>Between 1 and the number of days in the given month of the given year.</p>
</dd></dl>
<p>Supported operations:</p>
<table border="1" class="docutils">
<colgroup>
<col width="40%" />
<col width="60%" />
</colgroup>
<thead valign="bottom">
<tr class="row-odd"><th class="head">Operation</th>
<th class="head">Result</th>
</tr>
</thead>
<tbody valign="top">
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">date2</span> <span class="pre">=</span> <span class="pre">date1</span> <span class="pre">+</span> <span class="pre">timedelta</span></code></td>
<td><em>date2</em> is <code class="docutils literal notranslate"><span class="pre">timedelta.days</span></code> days removed
from <em>date1</em>. (1)</td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">date2</span> <span class="pre">=</span> <span class="pre">date1</span> <span class="pre">-</span> <span class="pre">timedelta</span></code></td>
<td>Computes <em>date2</em> such that <code class="docutils literal notranslate"><span class="pre">date2</span> <span class="pre">+</span>
<span class="pre">timedelta</span> <span class="pre">==</span> <span class="pre">date1</span></code>. (2)</td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">timedelta</span> <span class="pre">=</span> <span class="pre">date1</span> <span class="pre">-</span> <span class="pre">date2</span></code></td>
<td>(3)</td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">date1</span> <span class="pre"><</span> <span class="pre">date2</span></code></td>
<td><em>date1</em> is considered less than <em>date2</em> when
<em>date1</em> precedes <em>date2</em> in time. (4)</td>
</tr>
</tbody>
</table>
<p>註解：</p>
<ol class="arabic simple">
<li><em>date2</em> is moved forward in time if <code class="docutils literal notranslate"><span class="pre">timedelta.days</span> <span class="pre">></span> <span class="pre">0</span></code>, or backward if
<code class="docutils literal notranslate"><span class="pre">timedelta.days</span> <span class="pre"><</span> <span class="pre">0</span></code>. Afterward <code class="docutils literal notranslate"><span class="pre">date2</span> <span class="pre">-</span> <span class="pre">date1</span> <span class="pre">==</span> <span class="pre">timedelta.days</span></code>.
<code class="docutils literal notranslate"><span class="pre">timedelta.seconds</span></code> and <code class="docutils literal notranslate"><span class="pre">timedelta.microseconds</span></code> are ignored.
<a class="reference internal" href="exceptions.html#OverflowError" title="OverflowError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OverflowError</span></code></a> is raised if <code class="docutils literal notranslate"><span class="pre">date2.year</span></code> would be smaller than
<a class="reference internal" href="#datetime.MINYEAR" title="datetime.MINYEAR"><code class="xref py py-const docutils literal notranslate"><span class="pre">MINYEAR</span></code></a> or larger than <a class="reference internal" href="#datetime.MAXYEAR" title="datetime.MAXYEAR"><code class="xref py py-const docutils literal notranslate"><span class="pre">MAXYEAR</span></code></a>.</li>
<li><code class="docutils literal notranslate"><span class="pre">timedelta.seconds</span></code> and <code class="docutils literal notranslate"><span class="pre">timedelta.microseconds</span></code> are ignored.</li>
<li>This is exact, and cannot overflow. timedelta.seconds and
timedelta.microseconds are 0, and date2 + timedelta == date1 after.</li>
<li>In other words, <code class="docutils literal notranslate"><span class="pre">date1</span> <span class="pre"><</span> <span class="pre">date2</span></code> if and only if <code class="docutils literal notranslate"><span class="pre">date1.toordinal()</span> <span class="pre"><</span>
<span class="pre">date2.toordinal()</span></code>. In order to stop comparison from falling back to the
default scheme of comparing object addresses, date comparison normally raises
<a class="reference internal" href="exceptions.html#TypeError" title="TypeError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">TypeError</span></code></a> if the other comparand isn’t also a <a class="reference internal" href="#datetime.date" title="datetime.date"><code class="xref py py-class docutils literal notranslate"><span class="pre">date</span></code></a> object.
However, <code class="docutils literal notranslate"><span class="pre">NotImplemented</span></code> is returned instead if the other comparand has a
<code class="xref py py-meth docutils literal notranslate"><span class="pre">timetuple()</span></code> attribute. This hook gives other kinds of date objects a
chance at implementing mixed-type comparison. If not, when a <a class="reference internal" href="#datetime.date" title="datetime.date"><code class="xref py py-class docutils literal notranslate"><span class="pre">date</span></code></a>
object is compared to an object of a different type, <a class="reference internal" href="exceptions.html#TypeError" title="TypeError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">TypeError</span></code></a> is raised
unless the comparison is <code class="docutils literal notranslate"><span class="pre">==</span></code> or <code class="docutils literal notranslate"><span class="pre">!=</span></code>. The latter cases return
<a class="reference internal" href="constants.html#False" title="False"><code class="xref py py-const docutils literal notranslate"><span class="pre">False</span></code></a> or <a class="reference internal" href="constants.html#True" title="True"><code class="xref py py-const docutils literal notranslate"><span class="pre">True</span></code></a>, respectively.</li>
</ol>
<p>Dates can be used as dictionary keys. In Boolean contexts, all <a class="reference internal" href="#datetime.date" title="datetime.date"><code class="xref py py-class docutils literal notranslate"><span class="pre">date</span></code></a>
objects are considered to be true.</p>
<p>Instance methods:</p>
<dl class="method">
<dt id="datetime.date.replace">
<code class="descclassname">date.</code><code class="descname">replace</code><span class="sig-paren">(</span><em>year=self.year</em>, <em>month=self.month</em>, <em>day=self.day</em><span class="sig-paren">)</span><a class="headerlink" href="#datetime.date.replace" title="本定義的永久連結">¶</a></dt>
<dd><p>Return a date with the same value, except for those parameters given new
values by whichever keyword arguments are specified. For example, if <code class="docutils literal notranslate"><span class="pre">d</span> <span class="pre">==</span>
<span class="pre">date(2002,</span> <span class="pre">12,</span> <span class="pre">31)</span></code>, then <code class="docutils literal notranslate"><span class="pre">d.replace(day=26)</span> <span class="pre">==</span> <span class="pre">date(2002,</span> <span class="pre">12,</span> <span class="pre">26)</span></code>.</p>
</dd></dl>
<dl class="method">
<dt id="datetime.date.timetuple">
<code class="descclassname">date.</code><code class="descname">timetuple</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#datetime.date.timetuple" title="本定義的永久連結">¶</a></dt>
<dd><p>Return a <a class="reference internal" href="time.html#time.struct_time" title="time.struct_time"><code class="xref py py-class docutils literal notranslate"><span class="pre">time.struct_time</span></code></a> such as returned by <a class="reference internal" href="time.html#time.localtime" title="time.localtime"><code class="xref py py-func docutils literal notranslate"><span class="pre">time.localtime()</span></code></a>.
The hours, minutes and seconds are 0, and the DST flag is -1. <code class="docutils literal notranslate"><span class="pre">d.timetuple()</span></code>
is equivalent to <code class="docutils literal notranslate"><span class="pre">time.struct_time((d.year,</span> <span class="pre">d.month,</span> <span class="pre">d.day,</span> <span class="pre">0,</span> <span class="pre">0,</span> <span class="pre">0,</span>
<span class="pre">d.weekday(),</span> <span class="pre">yday,</span> <span class="pre">-1))</span></code>, where <code class="docutils literal notranslate"><span class="pre">yday</span> <span class="pre">=</span> <span class="pre">d.toordinal()</span> <span class="pre">-</span> <span class="pre">date(d.year,</span> <span class="pre">1,</span>
<span class="pre">1).toordinal()</span> <span class="pre">+</span> <span class="pre">1</span></code> is the day number within the current year starting with
<code class="docutils literal notranslate"><span class="pre">1</span></code> for January 1st.</p>
</dd></dl>
<dl class="method">
<dt id="datetime.date.toordinal">
<code class="descclassname">date.</code><code class="descname">toordinal</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#datetime.date.toordinal" title="本定義的永久連結">¶</a></dt>
<dd><p>Return the proleptic Gregorian ordinal of the date, where January 1 of year 1
has ordinal 1. For any <a class="reference internal" href="#datetime.date" title="datetime.date"><code class="xref py py-class docutils literal notranslate"><span class="pre">date</span></code></a> object <em>d</em>,
<code class="docutils literal notranslate"><span class="pre">date.fromordinal(d.toordinal())</span> <span class="pre">==</span> <span class="pre">d</span></code>.</p>
</dd></dl>
<dl class="method">
<dt id="datetime.date.weekday">
<code class="descclassname">date.</code><code class="descname">weekday</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#datetime.date.weekday" title="本定義的永久連結">¶</a></dt>
<dd><p>Return the day of the week as an integer, where Monday is 0 and Sunday is 6.
For example, <code class="docutils literal notranslate"><span class="pre">date(2002,</span> <span class="pre">12,</span> <span class="pre">4).weekday()</span> <span class="pre">==</span> <span class="pre">2</span></code>, a Wednesday. See also
<a class="reference internal" href="#datetime.date.isoweekday" title="datetime.date.isoweekday"><code class="xref py py-meth docutils literal notranslate"><span class="pre">isoweekday()</span></code></a>.</p>
</dd></dl>
<dl class="method">
<dt id="datetime.date.isoweekday">
<code class="descclassname">date.</code><code class="descname">isoweekday</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#datetime.date.isoweekday" title="本定義的永久連結">¶</a></dt>
<dd><p>Return the day of the week as an integer, where Monday is 1 and Sunday is 7.
For example, <code class="docutils literal notranslate"><span class="pre">date(2002,</span> <span class="pre">12,</span> <span class="pre">4).isoweekday()</span> <span class="pre">==</span> <span class="pre">3</span></code>, a Wednesday. See also
<a class="reference internal" href="#datetime.date.weekday" title="datetime.date.weekday"><code class="xref py py-meth docutils literal notranslate"><span class="pre">weekday()</span></code></a>, <a class="reference internal" href="#datetime.date.isocalendar" title="datetime.date.isocalendar"><code class="xref py py-meth docutils literal notranslate"><span class="pre">isocalendar()</span></code></a>.</p>
</dd></dl>
<dl class="method">
<dt id="datetime.date.isocalendar">
<code class="descclassname">date.</code><code class="descname">isocalendar</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#datetime.date.isocalendar" title="本定義的永久連結">¶</a></dt>
<dd><p>Return a 3-tuple, (ISO year, ISO week number, ISO weekday).</p>
<p>The ISO calendar is a widely used variant of the Gregorian calendar. See
<a class="reference external" href="https://www.staff.science.uu.nl/~gent0113/calendar/isocalendar.htm">https://www.staff.science.uu.nl/~gent0113/calendar/isocalendar.htm</a> for a good
explanation.</p>
<p>The ISO year consists of 52 or 53 full weeks, and where a week starts on a
Monday and ends on a Sunday. The first week of an ISO year is the first
(Gregorian) calendar week of a year containing a Thursday. This is called week
number 1, and the ISO year of that Thursday is the same as its Gregorian year.</p>
<p>For example, 2004 begins on a Thursday, so the first week of ISO year 2004
begins on Monday, 29 Dec 2003 and ends on Sunday, 4 Jan 2004, so that
<code class="docutils literal notranslate"><span class="pre">date(2003,</span> <span class="pre">12,</span> <span class="pre">29).isocalendar()</span> <span class="pre">==</span> <span class="pre">(2004,</span> <span class="pre">1,</span> <span class="pre">1)</span></code> and <code class="docutils literal notranslate"><span class="pre">date(2004,</span> <span class="pre">1,</span>
<span class="pre">4).isocalendar()</span> <span class="pre">==</span> <span class="pre">(2004,</span> <span class="pre">1,</span> <span class="pre">7)</span></code>.</p>
</dd></dl>
<dl class="method">
<dt id="datetime.date.isoformat">
<code class="descclassname">date.</code><code class="descname">isoformat</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#datetime.date.isoformat" title="本定義的永久連結">¶</a></dt>
<dd><p>Return a string representing the date in ISO 8601 format, 『YYYY-MM-DD』. For
example, <code class="docutils literal notranslate"><span class="pre">date(2002,</span> <span class="pre">12,</span> <span class="pre">4).isoformat()</span> <span class="pre">==</span> <span class="pre">'2002-12-04'</span></code>.</p>
</dd></dl>
<dl class="method">
<dt id="datetime.date.__str__">
<code class="descclassname">date.</code><code class="descname">__str__</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#datetime.date.__str__" title="本定義的永久連結">¶</a></dt>
<dd><p>For a date <em>d</em>, <code class="docutils literal notranslate"><span class="pre">str(d)</span></code> is equivalent to <code class="docutils literal notranslate"><span class="pre">d.isoformat()</span></code>.</p>
</dd></dl>
<dl class="method">
<dt id="datetime.date.ctime">
<code class="descclassname">date.</code><code class="descname">ctime</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#datetime.date.ctime" title="本定義的永久連結">¶</a></dt>
<dd><p>Return a string representing the date, for example <code class="docutils literal notranslate"><span class="pre">date(2002,</span> <span class="pre">12,</span>
<span class="pre">4).ctime()</span> <span class="pre">==</span> <span class="pre">'Wed</span> <span class="pre">Dec</span> <span class="pre">4</span> <span class="pre">00:00:00</span> <span class="pre">2002'</span></code>. <code class="docutils literal notranslate"><span class="pre">d.ctime()</span></code> is equivalent to
<code class="docutils literal notranslate"><span class="pre">time.ctime(time.mktime(d.timetuple()))</span></code> on platforms where the native C
<code class="xref c c-func docutils literal notranslate"><span class="pre">ctime()</span></code> function (which <a class="reference internal" href="time.html#time.ctime" title="time.ctime"><code class="xref py py-func docutils literal notranslate"><span class="pre">time.ctime()</span></code></a> invokes, but which
<a class="reference internal" href="#datetime.date.ctime" title="datetime.date.ctime"><code class="xref py py-meth docutils literal notranslate"><span class="pre">date.ctime()</span></code></a> does not invoke) conforms to the C standard.</p>
</dd></dl>
<dl class="method">
<dt id="datetime.date.strftime">
<code class="descclassname">date.</code><code class="descname">strftime</code><span class="sig-paren">(</span><em>format</em><span class="sig-paren">)</span><a class="headerlink" href="#datetime.date.strftime" title="本定義的永久連結">¶</a></dt>
<dd><p>Return a string representing the date, controlled by an explicit format string.
Format codes referring to hours, minutes or seconds will see 0 values. For a
complete list of formatting directives, see
<a class="reference internal" href="#strftime-strptime-behavior"><span class="std std-ref">strftime() and strptime() Behavior</span></a>.</p>
</dd></dl>
<dl class="method">
<dt id="datetime.date.__format__">
<code class="descclassname">date.</code><code class="descname">__format__</code><span class="sig-paren">(</span><em>format</em><span class="sig-paren">)</span><a class="headerlink" href="#datetime.date.__format__" title="本定義的永久連結">¶</a></dt>
<dd><p>Same as <a class="reference internal" href="#datetime.date.strftime" title="datetime.date.strftime"><code class="xref py py-meth docutils literal notranslate"><span class="pre">date.strftime()</span></code></a>. This makes it possible to specify a format
string for a <a class="reference internal" href="#datetime.date" title="datetime.date"><code class="xref py py-class docutils literal notranslate"><span class="pre">date</span></code></a> object in <a class="reference internal" href="../reference/lexical_analysis.html#f-strings"><span class="std std-ref">formatted string
literals</span></a> and when using <a class="reference internal" href="stdtypes.html#str.format" title="str.format"><code class="xref py py-meth docutils literal notranslate"><span class="pre">str.format()</span></code></a>. For a
complete list of formatting directives, see
<a class="reference internal" href="#strftime-strptime-behavior"><span class="std std-ref">strftime() and strptime() Behavior</span></a>.</p>
</dd></dl>
<p>Example of counting days to an event:</p>
<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">import</span> <span class="nn">time</span>
<span class="gp">>>> </span><span class="kn">from</span> <span class="nn">datetime</span> <span class="k">import</span> <span class="n">date</span>
<span class="gp">>>> </span><span class="n">today</span> <span class="o">=</span> <span class="n">date</span><span class="o">.</span><span class="n">today</span><span class="p">()</span>
<span class="gp">>>> </span><span class="n">today</span>
<span class="go">datetime.date(2007, 12, 5)</span>
<span class="gp">>>> </span><span class="n">today</span> <span class="o">==</span> <span class="n">date</span><span class="o">.</span><span class="n">fromtimestamp</span><span class="p">(</span><span class="n">time</span><span class="o">.</span><span class="n">time</span><span class="p">())</span>
<span class="go">True</span>
<span class="gp">>>> </span><span class="n">my_birthday</span> <span class="o">=</span> <span class="n">date</span><span class="p">(</span><span class="n">today</span><span class="o">.</span><span class="n">year</span><span class="p">,</span> <span class="mi">6</span><span class="p">,</span> <span class="mi">24</span><span class="p">)</span>
<span class="gp">>>> </span><span class="k">if</span> <span class="n">my_birthday</span> <span class="o"><</span> <span class="n">today</span><span class="p">:</span>
<span class="gp">... </span> <span class="n">my_birthday</span> <span class="o">=</span> <span class="n">my_birthday</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="n">year</span><span class="o">=</span><span class="n">today</span><span class="o">.</span><span class="n">year</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span>
<span class="gp">>>> </span><span class="n">my_birthday</span>
<span class="go">datetime.date(2008, 6, 24)</span>
<span class="gp">>>> </span><span class="n">time_to_birthday</span> <span class="o">=</span> <span class="nb">abs</span><span class="p">(</span><span class="n">my_birthday</span> <span class="o">-</span> <span class="n">today</span><span class="p">)</span>
<span class="gp">>>> </span><span class="n">time_to_birthday</span><span class="o">.</span><span class="n">days</span>
<span class="go">202</span>
</pre></div>
</div>
<p>Example of working with <a class="reference internal" href="#datetime.date" title="datetime.date"><code class="xref py py-class docutils literal notranslate"><span class="pre">date</span></code></a>:</p>
<div class="highlight-pycon notranslate"><div class="highlight"><pre><span></span><span class="gp">>>> </span><span class="kn">from</span> <span class="nn">datetime</span> <span class="kn">import</span> <span class="n">date</span>
<span class="gp">>>> </span><span class="n">d</span> <span class="o">=</span> <span class="n">date</span><span class="o">.</span><span class="n">fromordinal</span><span class="p">(</span><span class="mi">730920</span><span class="p">)</span> <span class="c1"># 730920th day after 1. 1. 0001</span>
<span class="gp">>>> </span><span class="n">d</span>
<span class="go">datetime.date(2002, 3, 11)</span>
<span class="gp">>>> </span><span class="n">t</span> <span class="o">=</span> <span class="n">d</span><span class="o">.</span><span class="n">timetuple</span><span class="p">()</span>
<span class="gp">>>> </span><span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="n">t</span><span class="p">:</span>
<span class="gp">... </span> <span class="k">print</span><span class="p">(</span><span class="n">i</span><span class="p">)</span>
<span class="go">2002 # year</span>
<span class="go">3 # month</span>
<span class="go">11 # day</span>
<span class="go">0</span>
<span class="go">0</span>
<span class="go">0</span>
<span class="go">0 # weekday (0 = Monday)</span>
<span class="go">70 # 70th day in the year</span>
<span class="go">-1</span>
<span class="gp">>>> </span><span class="n">ic</span> <span class="o">=</span> <span class="n">d</span><span class="o">.</span><span class="n">isocalendar</span><span class="p">()</span>
<span class="gp">>>> </span><span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="n">ic</span><span class="p">:</span>
<span class="gp">... </span> <span class="k">print</span><span class="p">(</span><span class="n">i</span><span class="p">)</span>
<span class="go">2002 # ISO year</span>
<span class="go">11 # ISO week number</span>
<span class="go">1 # ISO day number ( 1 = Monday )</span>
<span class="gp">>>> </span><span class="n">d</span><span class="o">.</span><span class="n">isoformat</span><span class="p">()</span>
<span class="go">'2002-03-11'</span>
<span class="gp">>>> </span><span class="n">d</span><span class="o">.</span><span class="n">strftime</span><span class="p">(</span><span class="s2">"</span><span class="si">%d</span><span class="s2">/%m/%y"</span><span class="p">)</span>
<span class="go">'11/03/02'</span>
<span class="gp">>>> </span><span class="n">d</span><span class="o">.</span><span class="n">strftime</span><span class="p">(</span><span class="s2">"%A </span><span class="si">%d</span><span class="s2">. %B %Y"</span><span class="p">)</span>
<span class="go">'Monday 11. March 2002'</span>
<span class="gp">>>> </span><span class="s1">'The {1} is {0:</span><span class="si">%d</span><span class="s1">}, the {2} is {0:%B}.'</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">d</span><span class="p">,</span> <span class="s2">"day"</span><span class="p">,</span> <span class="s2">"month"</span><span class="p">)</span>
<span class="go">'The day is 11, the month is March.'</span>
</pre></div>
</div>
</div>
<div class="section" id="datetime-objects">
<span id="datetime-datetime"></span><h2>8.1.4. <a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> Objects<a class="headerlink" href="#datetime-objects" title="本標題的永久連結">¶</a></h2>
<p>A <a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> object is a single object containing all the information
from a <a class="reference internal" href="#datetime.date" title="datetime.date"><code class="xref py py-class docutils literal notranslate"><span class="pre">date</span></code></a> object and a <a class="reference internal" href="#datetime.time" title="datetime.time"><code class="xref py py-class docutils literal notranslate"><span class="pre">time</span></code></a> object. Like a <a class="reference internal" href="#datetime.date" title="datetime.date"><code class="xref py py-class docutils literal notranslate"><span class="pre">date</span></code></a>
object, <a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> assumes the current Gregorian calendar extended in
both directions; like a time object, <a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> assumes there are exactly
3600*24 seconds in every day.</p>
<p>Constructor:</p>
<dl class="class">
<dt id="datetime.datetime">
<em class="property">class </em><code class="descclassname">datetime.</code><code class="descname">datetime</code><span class="sig-paren">(</span><em>year</em>, <em>month</em>, <em>day</em>, <em>hour=0</em>, <em>minute=0</em>, <em>second=0</em>, <em>microsecond=0</em>, <em>tzinfo=None</em>, <em>*</em>, <em>fold=0</em><span class="sig-paren">)</span><a class="headerlink" href="#datetime.datetime" title="本定義的永久連結">¶</a></dt>
<dd><p>The year, month and day arguments are required. <em>tzinfo</em> may be <code class="docutils literal notranslate"><span class="pre">None</span></code>, or an
instance of a <a class="reference internal" href="#datetime.tzinfo" title="datetime.tzinfo"><code class="xref py py-class docutils literal notranslate"><span class="pre">tzinfo</span></code></a> subclass. The remaining arguments may be integers,
in the following ranges:</p>
<ul class="simple">
<li><code class="docutils literal notranslate"><span class="pre">MINYEAR</span> <span class="pre"><=</span> <span class="pre">year</span> <span class="pre"><=</span> <span class="pre">MAXYEAR</span></code>,</li>
<li><code class="docutils literal notranslate"><span class="pre">1</span> <span class="pre"><=</span> <span class="pre">month</span> <span class="pre"><=</span> <span class="pre">12</span></code>,</li>
<li><code class="docutils literal notranslate"><span class="pre">1</span> <span class="pre"><=</span> <span class="pre">day</span> <span class="pre"><=</span> <span class="pre">number</span> <span class="pre">of</span> <span class="pre">days</span> <span class="pre">in</span> <span class="pre">the</span> <span class="pre">given</span> <span class="pre">month</span> <span class="pre">and</span> <span class="pre">year</span></code>,</li>
<li><code class="docutils literal notranslate"><span class="pre">0</span> <span class="pre"><=</span> <span class="pre">hour</span> <span class="pre"><</span> <span class="pre">24</span></code>,</li>
<li><code class="docutils literal notranslate"><span class="pre">0</span> <span class="pre"><=</span> <span class="pre">minute</span> <span class="pre"><</span> <span class="pre">60</span></code>,</li>
<li><code class="docutils literal notranslate"><span class="pre">0</span> <span class="pre"><=</span> <span class="pre">second</span> <span class="pre"><</span> <span class="pre">60</span></code>,</li>
<li><code class="docutils literal notranslate"><span class="pre">0</span> <span class="pre"><=</span> <span class="pre">microsecond</span> <span class="pre"><</span> <span class="pre">1000000</span></code>,</li>
<li><code class="docutils literal notranslate"><span class="pre">fold</span> <span class="pre">in</span> <span class="pre">[0,</span> <span class="pre">1]</span></code>.</li>
</ul>
<p>If an argument outside those ranges is given, <a class="reference internal" href="exceptions.html#ValueError" title="ValueError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">ValueError</span></code></a> is raised.</p>
<div class="versionadded">
<p><span class="versionmodified">3.6 版新加入: </span>Added the <code class="docutils literal notranslate"><span class="pre">fold</span></code> argument.</p>
</div>
</dd></dl>
<p>Other constructors, all class methods:</p>
<dl class="classmethod">
<dt id="datetime.datetime.today">
<em class="property">classmethod </em><code class="descclassname">datetime.</code><code class="descname">today</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#datetime.datetime.today" title="本定義的永久連結">¶</a></dt>
<dd><p>Return the current local datetime, with <a class="reference internal" href="#datetime.datetime.tzinfo" title="datetime.datetime.tzinfo"><code class="xref py py-attr docutils literal notranslate"><span class="pre">tzinfo</span></code></a> <code class="docutils literal notranslate"><span class="pre">None</span></code>. This is
equivalent to <code class="docutils literal notranslate"><span class="pre">datetime.fromtimestamp(time.time())</span></code>. See also <a class="reference internal" href="#datetime.datetime.now" title="datetime.datetime.now"><code class="xref py py-meth docutils literal notranslate"><span class="pre">now()</span></code></a>,
<a class="reference internal" href="#datetime.datetime.fromtimestamp" title="datetime.datetime.fromtimestamp"><code class="xref py py-meth docutils literal notranslate"><span class="pre">fromtimestamp()</span></code></a>.</p>
</dd></dl>
<dl class="classmethod">
<dt id="datetime.datetime.now">
<em class="property">classmethod </em><code class="descclassname">datetime.</code><code class="descname">now</code><span class="sig-paren">(</span><em>tz=None</em><span class="sig-paren">)</span><a class="headerlink" href="#datetime.datetime.now" title="本定義的永久連結">¶</a></dt>
<dd><p>Return the current local date and time. If optional argument <em>tz</em> is <code class="docutils literal notranslate"><span class="pre">None</span></code>
or not specified, this is like <a class="reference internal" href="#datetime.datetime.today" title="datetime.datetime.today"><code class="xref py py-meth docutils literal notranslate"><span class="pre">today()</span></code></a>, but, if possible, supplies more
precision than can be gotten from going through a <a class="reference internal" href="time.html#time.time" title="time.time"><code class="xref py py-func docutils literal notranslate"><span class="pre">time.time()</span></code></a> timestamp
(for example, this may be possible on platforms supplying the C
<code class="xref c c-func docutils literal notranslate"><span class="pre">gettimeofday()</span></code> function).</p>
<p>If <em>tz</em> is not <code class="docutils literal notranslate"><span class="pre">None</span></code>, it must be an instance of a <a class="reference internal" href="#datetime.tzinfo" title="datetime.tzinfo"><code class="xref py py-class docutils literal notranslate"><span class="pre">tzinfo</span></code></a> subclass, and the
current date and time are converted to <em>tz</em>’s time zone. In this case the
result is equivalent to <code class="docutils literal notranslate"><span class="pre">tz.fromutc(datetime.utcnow().replace(tzinfo=tz))</span></code>.
See also <a class="reference internal" href="#datetime.datetime.today" title="datetime.datetime.today"><code class="xref py py-meth docutils literal notranslate"><span class="pre">today()</span></code></a>, <a class="reference internal" href="#datetime.datetime.utcnow" title="datetime.datetime.utcnow"><code class="xref py py-meth docutils literal notranslate"><span class="pre">utcnow()</span></code></a>.</p>
</dd></dl>
<dl class="classmethod">
<dt id="datetime.datetime.utcnow">
<em class="property">classmethod </em><code class="descclassname">datetime.</code><code class="descname">utcnow</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#datetime.datetime.utcnow" title="本定義的永久連結">¶</a></dt>
<dd><p>Return the current UTC date and time, with <a class="reference internal" href="#datetime.datetime.tzinfo" title="datetime.datetime.tzinfo"><code class="xref py py-attr docutils literal notranslate"><span class="pre">tzinfo</span></code></a> <code class="docutils literal notranslate"><span class="pre">None</span></code>. This is like
<a class="reference internal" href="#datetime.datetime.now" title="datetime.datetime.now"><code class="xref py py-meth docutils literal notranslate"><span class="pre">now()</span></code></a>, but returns the current UTC date and time, as a naive
<a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> object. An aware current UTC datetime can be obtained by
calling <code class="docutils literal notranslate"><span class="pre">datetime.now(timezone.utc)</span></code>. See also <a class="reference internal" href="#datetime.datetime.now" title="datetime.datetime.now"><code class="xref py py-meth docutils literal notranslate"><span class="pre">now()</span></code></a>.</p>
</dd></dl>
<dl class="classmethod">
<dt id="datetime.datetime.fromtimestamp">
<em class="property">classmethod </em><code class="descclassname">datetime.</code><code class="descname">fromtimestamp</code><span class="sig-paren">(</span><em>timestamp</em>, <em>tz=None</em><span class="sig-paren">)</span><a class="headerlink" href="#datetime.datetime.fromtimestamp" title="本定義的永久連結">¶</a></dt>
<dd><p>Return the local date and time corresponding to the POSIX timestamp, such as is
returned by <a class="reference internal" href="time.html#time.time" title="time.time"><code class="xref py py-func docutils literal notranslate"><span class="pre">time.time()</span></code></a>. If optional argument <em>tz</em> is <code class="docutils literal notranslate"><span class="pre">None</span></code> or not
specified, the timestamp is converted to the platform’s local date and time, and
the returned <a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> object is naive.</p>
<p>If <em>tz</em> is not <code class="docutils literal notranslate"><span class="pre">None</span></code>, it must be an instance of a <a class="reference internal" href="#datetime.tzinfo" title="datetime.tzinfo"><code class="xref py py-class docutils literal notranslate"><span class="pre">tzinfo</span></code></a> subclass, and the
timestamp is converted to <em>tz</em>’s time zone. In this case the result is
equivalent to
<code class="docutils literal notranslate"><span class="pre">tz.fromutc(datetime.utcfromtimestamp(timestamp).replace(tzinfo=tz))</span></code>.</p>
<p><a class="reference internal" href="#datetime.datetime.fromtimestamp" title="datetime.datetime.fromtimestamp"><code class="xref py py-meth docutils literal notranslate"><span class="pre">fromtimestamp()</span></code></a> may raise <a class="reference internal" href="exceptions.html#OverflowError" title="OverflowError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OverflowError</span></code></a>, if the timestamp is out of
the range of values supported by the platform C <code class="xref c c-func docutils literal notranslate"><span class="pre">localtime()</span></code> or
<code class="xref c c-func docutils literal notranslate"><span class="pre">gmtime()</span></code> functions, and <a class="reference internal" href="exceptions.html#OSError" title="OSError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OSError</span></code></a> on <code class="xref c c-func docutils literal notranslate"><span class="pre">localtime()</span></code> or
<code class="xref c c-func docutils literal notranslate"><span class="pre">gmtime()</span></code> failure.
It’s common for this to be restricted to years in
1970 through 2038. Note that on non-POSIX systems that include leap seconds in
their notion of a timestamp, leap seconds are ignored by <a class="reference internal" href="#datetime.datetime.fromtimestamp" title="datetime.datetime.fromtimestamp"><code class="xref py py-meth docutils literal notranslate"><span class="pre">fromtimestamp()</span></code></a>,
and then it’s possible to have two timestamps differing by a second that yield
identical <a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> objects. See also <a class="reference internal" href="#datetime.datetime.utcfromtimestamp" title="datetime.datetime.utcfromtimestamp"><code class="xref py py-meth docutils literal notranslate"><span class="pre">utcfromtimestamp()</span></code></a>.</p>
<div class="versionchanged">
<p><span class="versionmodified">3.3 版更變: </span>Raise <a class="reference internal" href="exceptions.html#OverflowError" title="OverflowError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OverflowError</span></code></a> instead of <a class="reference internal" href="exceptions.html#ValueError" title="ValueError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">ValueError</span></code></a> if the timestamp
is out of the range of values supported by the platform C
<code class="xref c c-func docutils literal notranslate"><span class="pre">localtime()</span></code> or <code class="xref c c-func docutils literal notranslate"><span class="pre">gmtime()</span></code> functions. Raise <a class="reference internal" href="exceptions.html#OSError" title="OSError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OSError</span></code></a>
instead of <a class="reference internal" href="exceptions.html#ValueError" title="ValueError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">ValueError</span></code></a> on <code class="xref c c-func docutils literal notranslate"><span class="pre">localtime()</span></code> or <code class="xref c c-func docutils literal notranslate"><span class="pre">gmtime()</span></code>
failure.</p>
</div>
<div class="versionchanged">
<p><span class="versionmodified">3.6 版更變: </span><a class="reference internal" href="#datetime.datetime.fromtimestamp" title="datetime.datetime.fromtimestamp"><code class="xref py py-meth docutils literal notranslate"><span class="pre">fromtimestamp()</span></code></a> may return instances with <a class="reference internal" href="#datetime.datetime.fold" title="datetime.datetime.fold"><code class="xref py py-attr docutils literal notranslate"><span class="pre">fold</span></code></a> set to 1.</p>
</div>
</dd></dl>
<dl class="classmethod">
<dt id="datetime.datetime.utcfromtimestamp">
<em class="property">classmethod </em><code class="descclassname">datetime.</code><code class="descname">utcfromtimestamp</code><span class="sig-paren">(</span><em>timestamp</em><span class="sig-paren">)</span><a class="headerlink" href="#datetime.datetime.utcfromtimestamp" title="本定義的永久連結">¶</a></dt>
<dd><p>Return the UTC <a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> corresponding to the POSIX timestamp, with
<a class="reference internal" href="#datetime.datetime.tzinfo" title="datetime.datetime.tzinfo"><code class="xref py py-attr docutils literal notranslate"><span class="pre">tzinfo</span></code></a> <code class="docutils literal notranslate"><span class="pre">None</span></code>. This may raise <a class="reference internal" href="exceptions.html#OverflowError" title="OverflowError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OverflowError</span></code></a>, if the timestamp is
out of the range of values supported by the platform C <code class="xref c c-func docutils literal notranslate"><span class="pre">gmtime()</span></code> function,
and <a class="reference internal" href="exceptions.html#OSError" title="OSError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OSError</span></code></a> on <code class="xref c c-func docutils literal notranslate"><span class="pre">gmtime()</span></code> failure.
It’s common for this to be restricted to years in 1970 through 2038.</p>
<p>To get an aware <a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> object, call <a class="reference internal" href="#datetime.datetime.fromtimestamp" title="datetime.datetime.fromtimestamp"><code class="xref py py-meth docutils literal notranslate"><span class="pre">fromtimestamp()</span></code></a>:</p>
<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="n">datetime</span><span class="o">.</span><span class="n">fromtimestamp</span><span class="p">(</span><span class="n">timestamp</span><span class="p">,</span> <span class="n">timezone</span><span class="o">.</span><span class="n">utc</span><span class="p">)</span>
</pre></div>
</div>
<p>On the POSIX compliant platforms, it is equivalent to the following
expression:</p>
<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="n">datetime</span><span class="p">(</span><span class="mi">1970</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="n">tzinfo</span><span class="o">=</span><span class="n">timezone</span><span class="o">.</span><span class="n">utc</span><span class="p">)</span> <span class="o">+</span> <span class="n">timedelta</span><span class="p">(</span><span class="n">seconds</span><span class="o">=</span><span class="n">timestamp</span><span class="p">)</span>
</pre></div>
</div>
<p>except the latter formula always supports the full years range: between
<a class="reference internal" href="#datetime.MINYEAR" title="datetime.MINYEAR"><code class="xref py py-const docutils literal notranslate"><span class="pre">MINYEAR</span></code></a> and <a class="reference internal" href="#datetime.MAXYEAR" title="datetime.MAXYEAR"><code class="xref py py-const docutils literal notranslate"><span class="pre">MAXYEAR</span></code></a> inclusive.</p>
<div class="versionchanged">
<p><span class="versionmodified">3.3 版更變: </span>Raise <a class="reference internal" href="exceptions.html#OverflowError" title="OverflowError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OverflowError</span></code></a> instead of <a class="reference internal" href="exceptions.html#ValueError" title="ValueError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">ValueError</span></code></a> if the timestamp
is out of the range of values supported by the platform C
<code class="xref c c-func docutils literal notranslate"><span class="pre">gmtime()</span></code> function. Raise <a class="reference internal" href="exceptions.html#OSError" title="OSError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OSError</span></code></a> instead of
<a class="reference internal" href="exceptions.html#ValueError" title="ValueError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">ValueError</span></code></a> on <code class="xref c c-func docutils literal notranslate"><span class="pre">gmtime()</span></code> failure.</p>
</div>
</dd></dl>
<dl class="classmethod">
<dt id="datetime.datetime.fromordinal">
<em class="property">classmethod </em><code class="descclassname">datetime.</code><code class="descname">fromordinal</code><span class="sig-paren">(</span><em>ordinal</em><span class="sig-paren">)</span><a class="headerlink" href="#datetime.datetime.fromordinal" title="本定義的永久連結">¶</a></dt>
<dd><p>Return the <a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> corresponding to the proleptic Gregorian ordinal,
where January 1 of year 1 has ordinal 1. <a class="reference internal" href="exceptions.html#ValueError" title="ValueError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">ValueError</span></code></a> is raised unless <code class="docutils literal notranslate"><span class="pre">1</span>
<span class="pre"><=</span> <span class="pre">ordinal</span> <span class="pre"><=</span> <span class="pre">datetime.max.toordinal()</span></code>. The hour, minute, second and
microsecond of the result are all 0, and <a class="reference internal" href="#datetime.datetime.tzinfo" title="datetime.datetime.tzinfo"><code class="xref py py-attr docutils literal notranslate"><span class="pre">tzinfo</span></code></a> is <code class="docutils literal notranslate"><span class="pre">None</span></code>.</p>
</dd></dl>
<dl class="classmethod">
<dt id="datetime.datetime.combine">
<em class="property">classmethod </em><code class="descclassname">datetime.</code><code class="descname">combine</code><span class="sig-paren">(</span><em>date</em>, <em>time</em>, <em>tzinfo=self.tzinfo</em><span class="sig-paren">)</span><a class="headerlink" href="#datetime.datetime.combine" title="本定義的永久連結">¶</a></dt>
<dd><p>Return a new <a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> object whose date components are equal to the
given <a class="reference internal" href="#datetime.date" title="datetime.date"><code class="xref py py-class docutils literal notranslate"><span class="pre">date</span></code></a> object’s, and whose time components
are equal to the given <a class="reference internal" href="#datetime.time" title="datetime.time"><code class="xref py py-class docutils literal notranslate"><span class="pre">time</span></code></a> object’s. If the <em>tzinfo</em>
argument is provided, its value is used to set the <a class="reference internal" href="#datetime.datetime.tzinfo" title="datetime.datetime.tzinfo"><code class="xref py py-attr docutils literal notranslate"><span class="pre">tzinfo</span></code></a> attribute
of the result, otherwise the <a class="reference internal" href="#datetime.time.tzinfo" title="datetime.time.tzinfo"><code class="xref py py-attr docutils literal notranslate"><span class="pre">tzinfo</span></code></a> attribute of the <em>time</em> argument
is used.</p>
<p>For any <a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> object <em>d</em>,
<code class="docutils literal notranslate"><span class="pre">d</span> <span class="pre">==</span> <span class="pre">datetime.combine(d.date(),</span> <span class="pre">d.time(),</span> <span class="pre">d.tzinfo)</span></code>. If date is a
<a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> object, its time components and <a class="reference internal" href="#datetime.datetime.tzinfo" title="datetime.datetime.tzinfo"><code class="xref py py-attr docutils literal notranslate"><span class="pre">tzinfo</span></code></a> attributes
are ignored.</p>
<div class="versionchanged">
<p><span class="versionmodified">3.6 版更變: </span>Added the <em>tzinfo</em> argument.</p>
</div>
</dd></dl>
<dl class="classmethod">
<dt id="datetime.datetime.fromisoformat">
<em class="property">classmethod </em><code class="descclassname">datetime.</code><code class="descname">fromisoformat</code><span class="sig-paren">(</span><em>date_string</em><span class="sig-paren">)</span><a class="headerlink" href="#datetime.datetime.fromisoformat" title="本定義的永久連結">¶</a></dt>
<dd><p>Return a <a class="reference internal" href="#module-datetime" title="datetime: Basic date and time types."><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> corresponding to a <em>date_string</em> in one of the
formats emitted by <a class="reference internal" href="#datetime.date.isoformat" title="datetime.date.isoformat"><code class="xref py py-meth docutils literal notranslate"><span class="pre">date.isoformat()</span></code></a> and <a class="reference internal" href="#datetime.datetime.isoformat" title="datetime.datetime.isoformat"><code class="xref py py-meth docutils literal notranslate"><span class="pre">datetime.isoformat()</span></code></a>.
Specifically, this function supports strings in the format(s)
<code class="docutils literal notranslate"><span class="pre">YYYY-MM-DD[*HH[:MM[:SS[.mmm[mmm]]]][+HH:MM[:SS[.ffffff]]]]</span></code>,
where <code class="docutils literal notranslate"><span class="pre">*</span></code> can match any single character.</p>
<div class="admonition caution">
<p class="first admonition-title">警示</p>
<p class="last">This does not support parsing arbitrary ISO 8601 strings - it is only intended
as the inverse operation of <a class="reference internal" href="#datetime.datetime.isoformat" title="datetime.datetime.isoformat"><code class="xref py py-meth docutils literal notranslate"><span class="pre">datetime.isoformat()</span></code></a>.</p>
</div>
<div class="versionadded">
<p><span class="versionmodified">3.7 版新加入.</span></p>
</div>
</dd></dl>
<dl class="classmethod">
<dt id="datetime.datetime.strptime">
<em class="property">classmethod </em><code class="descclassname">datetime.</code><code class="descname">strptime</code><span class="sig-paren">(</span><em>date_string</em>, <em>format</em><span class="sig-paren">)</span><a class="headerlink" href="#datetime.datetime.strptime" title="本定義的永久連結">¶</a></dt>
<dd><p>Return a <a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> corresponding to <em>date_string</em>, parsed according to
<em>format</em>. This is equivalent to <code class="docutils literal notranslate"><span class="pre">datetime(*(time.strptime(date_string,</span>
<span class="pre">format)[0:6]))</span></code>. <a class="reference internal" href="exceptions.html#ValueError" title="ValueError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">ValueError</span></code></a> is raised if the date_string and format
can’t be parsed by <a class="reference internal" href="time.html#time.strptime" title="time.strptime"><code class="xref py py-func docutils literal notranslate"><span class="pre">time.strptime()</span></code></a> or if it returns a value which isn’t a
time tuple. For a complete list of formatting directives, see
<a class="reference internal" href="#strftime-strptime-behavior"><span class="std std-ref">strftime() and strptime() Behavior</span></a>.</p>
</dd></dl>
<p>Class attributes:</p>
<dl class="attribute">
<dt id="datetime.datetime.min">
<code class="descclassname">datetime.</code><code class="descname">min</code><a class="headerlink" href="#datetime.datetime.min" title="本定義的永久連結">¶</a></dt>
<dd><p>The earliest representable <a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a>, <code class="docutils literal notranslate"><span class="pre">datetime(MINYEAR,</span> <span class="pre">1,</span> <span class="pre">1,</span>
<span class="pre">tzinfo=None)</span></code>.</p>
</dd></dl>
<dl class="attribute">
<dt id="datetime.datetime.max">
<code class="descclassname">datetime.</code><code class="descname">max</code><a class="headerlink" href="#datetime.datetime.max" title="本定義的永久連結">¶</a></dt>
<dd><p>The latest representable <a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a>, <code class="docutils literal notranslate"><span class="pre">datetime(MAXYEAR,</span> <span class="pre">12,</span> <span class="pre">31,</span> <span class="pre">23,</span> <span class="pre">59,</span>
<span class="pre">59,</span> <span class="pre">999999,</span> <span class="pre">tzinfo=None)</span></code>.</p>
</dd></dl>
<dl class="attribute">
<dt id="datetime.datetime.resolution">
<code class="descclassname">datetime.</code><code class="descname">resolution</code><a class="headerlink" href="#datetime.datetime.resolution" title="本定義的永久連結">¶</a></dt>
<dd><p>The smallest possible difference between non-equal <a class="reference internal" href="#datetime.datetime" title="datetime.datetime"><code class="xref py py-class docutils literal notranslate"><span class="pre">datetime</span></code></a> objects,
<code class="docutils literal notranslate"><span class="pre">timedelta(microseconds=1)</span></code>.</p>
</dd></dl>
<p>Instance attributes (read-only):</p>
<dl class="attribute">
<dt id="datetime.datetime.year">
<code class="descclassname">datetime.</code><code class="descname">year</code><a class="headerlink" href="#datetime.datetime.year" title="本定義的永久連結">¶</a></dt>
<dd><p>Between <a class="reference internal" href="#datetime.MINYEAR" title="datetime.MINYEAR"><code class="xref py py-const docutils literal notranslate"><span class="pre">MINYEAR</span></code></a> and <a class="reference internal" href="#datetime.MAXYEAR" title="datetime.MAXYEAR"><code class="xref py py-const docutils literal notranslate"><span class="pre">MAXYEAR</span></code></a> inclusive.</p>
</dd></dl>
<dl class="attribute">
<dt id="datetime.datetime.month">
<code class="descclassname">datetime.</code><code class="descname">month</code><a class="headerlink" href="#datetime.datetime.month" title="本定義的永久連結">¶</a></dt>
<dd><p>Between 1 and 12 inclusive.</p>
</dd></dl>