Struct

* **Module that performs conversions between a sequence of numbers and a bytes object.**

from struct import pack, unpack, iter_unpack

<array> = array('<typecode>', <bytes>) # Array from bytes object.

<array> = array('<typecode>', <array>) # Treats array as a sequence of numbers.

<bytes> = bytes(<array>) # Or: <array>.tobytes()

* **A sequence object that points to the memory of another object.**

* **Each element can reference a single or multiple consecutive bytes, depending on format.**

* **Order and number of elements can be changed with slicing.**

<mview> = memoryview(<bytes/bytearray/array>) # Immutable if bytes, else mutable.

<bytes> = bytes(<mview>) # Creates a new bytes object.

<bytes> = <bytes>.join(<coll_of_mviews>) # Joins mviews using bytes object as sep.

<array> = array('<typecode>', <mview>) # Treats mview as a sequence of numbers.

import matplotlib.pyplot as plt

plt.legend() # Adds a legend.

plt.savefig(<path>) # Saves the figure.

plt.show() # Displays the figure.

from curses import wrapper, ascii, A_REVERSE, KEY_UP, KEY_DOWN, KEY_LEFT, KEY_RIGHT, KEY_ENTER

def main(screen):

ch, first, selected, paths = 0, 0, 0, listdir()

<div><h2 id="struct"><a href="#struct" name="struct">#</a>Struct</h2><ul>

<li><strong>Module that performs conversions between a sequence of numbers and a bytes object.</strong></li>

</ul><pre><code class="python language-python hljs"><span class="hljs-keyword">from</span> struct <span class="hljs-keyword">import</span> pack, unpack, iter_unpack

&lt;array&gt; = array(<span class="hljs-string">'&lt;typecode&gt;'</span>, &lt;bytes&gt;) <span class="hljs-comment"># Array from bytes object.</span>

&lt;array&gt; = array(<span class="hljs-string">'&lt;typecode&gt;'</span>, &lt;array&gt;) <span class="hljs-comment"># Treats array as a sequence of numbers.</span>

&lt;bytes&gt; = bytes(&lt;array&gt;) <span class="hljs-comment"># Or: &lt;array&gt;.tobytes()</span>

<div><h2 id="memoryview"><a href="#memoryview" name="memoryview">#</a>Memory View</h2><ul>

<li><strong>A sequence object that points to the memory of another object.</strong></li>

<li><strong>Each element can reference a single or multiple consecutive bytes, depending on format.</strong></li>

<li><strong>Order and number of elements can be changed with slicing.</strong></li>

</ul><pre><code class="python language-python hljs">&lt;mview&gt; = memoryview(&lt;bytes/bytearray/array&gt;) <span class="hljs-comment"># Immutable if bytes, else mutable.</span>

&lt;real&gt; = &lt;mview&gt;[&lt;index&gt;] <span class="hljs-comment"># Returns an int or a float.</span>

&lt;mview&gt; = &lt;mview&gt;[&lt;slice&gt;] <span class="hljs-comment"># Mview with rearranged elements.</span>

&lt;bytes&gt; = &lt;bytes&gt;.join(&lt;coll_of_mviews&gt;) <span class="hljs-comment"># Joins mviews using bytes object as sep.</span>

&lt;array&gt; = array(<span class="hljs-string">'&lt;typecode&gt;'</span>, &lt;mview&gt;) <span class="hljs-comment"># Treats mview as a sequence of numbers.</span>

<pre><code class="python language-python hljs">&lt;list&gt; = list(&lt;mview&gt;) <span class="hljs-comment"># Returns list of ints or floats.</span>

<div><h2 id="plot"><a href="#plot" name="plot">#</a>Plot</h2><pre><code class="python language-python hljs"><span class="hljs-comment"># $ pip3 install matplotlib</span>

<span class="hljs-keyword">import</span> matplotlib.pyplot <span class="hljs-keyword">as</span> plt

plt.legend() <span class="hljs-comment"># Adds a legend.</span>

plt.savefig(&lt;path&gt;) <span class="hljs-comment"># Saves the figure.</span>

plt.show() <span class="hljs-comment"># Displays the figure.</span>

<div><h2 id="curses"><a href="#curses" name="curses">#</a>Curses</h2><div><h4 id="runsabasicfileexplorerintheterminal">Runs a basic file explorer in the terminal:</h4><pre><code class="python language-python hljs"><span class="hljs-keyword">from</span> curses <span class="hljs-keyword">import</span> wrapper, ascii, A_REVERSE, KEY_UP, KEY_DOWN, KEY_LEFT, KEY_RIGHT, KEY_ENTER

<span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">main</span><span class="hljs-params">(screen)</span>:</span>

ch, first, selected, paths = <span class="hljs-number">0</span>, <span class="hljs-number">0</span>, <span class="hljs-number">0</span>, listdir()