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Add string concatenation example
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‎notebooks/intermediate/html/idiomatic_misc2.html

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<h1 id="Idiomatic-Python---miscellaneous-part-2">Idiomatic Python - miscellaneous part 2<a class="anchor-link" href="#Idiomatic-Python---miscellaneous-part-2">&#182;</a></h1>
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<div class="cell border-box-sizing text_cell rendered"><div class="prompt input_prompt">
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</div>
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<div class="inner_cell">
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<div class="text_cell_render border-box-sizing rendered_html">
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<h2 id="String-concatenation">String concatenation<a class="anchor-link" href="#String-concatenation">&#182;</a></h2>
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</div>
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</div>
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</div>
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<div class="cell border-box-sizing code_cell rendered">
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<div class="input">
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<div class="prompt input_prompt">In&nbsp;[1]:</div>
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<div class="inner_cell">
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<div class="input_area">
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<div class=" highlight hl-ipython3"><pre><span></span><span class="n">names</span> <span class="o">=</span> <span class="p">(</span><span class="s1">&#39;John&#39;</span><span class="p">,</span> <span class="s1">&#39;Lisa&#39;</span><span class="p">,</span> <span class="s1">&#39;Terminator&#39;</span><span class="p">,</span> <span class="s1">&#39;Python&#39;</span><span class="p">)</span>
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</pre></div>
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</div>
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<p><font color='red'>Don't do this.</font></p>
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</div>
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</div>
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<div class="cell border-box-sizing code_cell rendered">
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<div class="input">
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<div class="prompt input_prompt">In&nbsp;[2]:</div>
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<div class="inner_cell">
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<div class="input_area">
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<div class=" highlight hl-ipython3"><pre><span></span><span class="n">semicolon_separated</span> <span class="o">=</span> <span class="n">names</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
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<span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">names</span><span class="p">[</span><span class="mi">1</span><span class="p">:]:</span>
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<span class="n">semicolon_separated</span> <span class="o">+=</span> <span class="s1">&#39;;&#39;</span> <span class="o">+</span> <span class="n">name</span>
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<span class="nb">print</span><span class="p">(</span><span class="n">semicolon_separated</span><span class="p">)</span>
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</pre></div>
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</div>
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</div>
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</div>
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<div class="output_wrapper">
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<div class="output">
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<div class="output_area">
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<div class="prompt"></div>
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<div class="output_subarea output_stream output_stdout output_text">
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<pre>John;Lisa;Terminator;Python
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</pre>
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</div>
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</div>
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</div>
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</div>
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</div>
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<div class="cell border-box-sizing text_cell rendered"><div class="prompt input_prompt">
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</div>
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<div class="inner_cell">
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<div class="text_cell_render border-box-sizing rendered_html">
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<h3 id="Use-`join`-instead!"><font color="green">Use `join` instead!</font><a class="anchor-link" href="#Use-`join`-instead!">&#182;</a></h3>
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</div>
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</div>
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</div>
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<div class="cell border-box-sizing code_cell rendered">
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<div class="input">
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<div class="prompt input_prompt">In&nbsp;[3]:</div>
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<div class="inner_cell">
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<div class="input_area">
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<div class=" highlight hl-ipython3"><pre><span></span><span class="n">semicolon_separated</span> <span class="o">=</span> <span class="s1">&#39;;&#39;</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">names</span><span class="p">)</span>
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<span class="nb">print</span><span class="p">(</span><span class="n">semicolon_separated</span><span class="p">)</span>
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</pre></div>
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</div>
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</div>
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</div>
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<div class="output_wrapper">
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<div class="output">
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<div class="output_area">
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<div class="prompt"></div>
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<div class="output_subarea output_stream output_stdout output_text">
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<pre>John;Lisa;Terminator;Python
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</pre>
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</div>
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</div>
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</div>
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</div>
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<div class=" highlight hl-ipython3"><pre><span></span><span class="n">a</span> <span class="o">=</span> <span class="mi">0</span>
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<div class=" highlight hl-ipython3"><pre><span></span><span class="n">my_variable</span> <span class="o">=</span> <span class="s1">&#39;default value&#39;</span>
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<div class=" highlight hl-ipython3"><pre><span></span><span class="n">my_variable</span> <span class="o">=</span> <span class="n">a</span> <span class="ow">or</span> <span class="n">b</span> <span class="ow">or</span> <span class="n">c</span> <span class="ow">or</span> <span class="s1">&#39;default value&#39;</span>
@@ -11938,7 +12042,7 @@ <h2 id="try---except---else"><code>try</code> - <code>except</code> - <code>else
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<div class=" highlight hl-ipython3"><pre><span></span><span class="n">exception_occured</span> <span class="o">=</span> <span class="kc">False</span>
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<div class=" highlight hl-ipython3"><pre><span></span><span class="k">try</span><span class="p">:</span>
@@ -12050,7 +12154,7 @@ <h2 id="try---finally"><code>try</code> - <code>finally</code><a class="anchor-l
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<div class=" highlight hl-ipython3"><pre><span></span><span class="k">def</span> <span class="nf">magical_calculation</span><span class="p">():</span>
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<div class=" highlight hl-ipython3"><pre><span></span><span class="k">def</span> <span class="nf">magical_calculation</span><span class="p">():</span>
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<div class=" highlight hl-ipython3"><pre><span></span><span class="k">try</span><span class="p">:</span>
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<div class=" highlight hl-ipython3"><pre><span></span><span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="s1">&#39;tmp.txt&#39;</span><span class="p">,</span> <span class="s1">&#39;w&#39;</span><span class="p">)</span> <span class="k">as</span> <span class="n">some_file</span><span class="p">:</span>
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<div class=" highlight hl-ipython3"><pre><span></span><span class="n">secret_data</span> <span class="o">=</span> <span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">5</span><span class="p">,</span> <span class="mi">99</span><span class="p">,</span> <span class="mi">8</span><span class="p">,</span> <span class="o">-</span><span class="mi">9</span><span class="p">)</span>
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<div class=" highlight hl-ipython3"><pre><span></span><span class="n">max_value</span> <span class="o">=</span> <span class="mi">0</span>
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<div class=" highlight hl-ipython3"><pre><span></span><span class="n">max_value</span> <span class="o">=</span> <span class="nb">max</span><span class="p">(</span><span class="n">secret_data</span><span class="p">)</span>
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<div class=" highlight hl-ipython3"><pre><span></span><span class="kn">from</span> <span class="nn">contextlib</span> <span class="k">import</span> <span class="n">suppress</span>
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<div class=" highlight hl-ipython3"><pre><span></span><span class="k">class</span> <span class="nc">Person</span><span class="p">:</span>
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<div class=" highlight hl-ipython3"><pre><span></span><span class="k">class</span> <span class="nc">Person</span><span class="p">:</span>

‎notebooks/intermediate/idiomatic_misc2.ipynb

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"# Idiomatic Python - miscellaneous part 2"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## String concatenation"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"names = ('John', 'Lisa', 'Terminator', 'Python')"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"<font color='red'>Don't do this.</font>"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"semicolon_separated = names[0]\n",
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"for name in names[1:]:\n",
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" semicolon_separated += ';' + name\n",
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"print(semicolon_separated)"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"### <font color='green'>Use `join` instead!</font>"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"semicolon_separated = ';'.join(names)\n",
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"print(semicolon_separated)"
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]
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},
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