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    <h1 class="" title="Iterations in Python" data-title="Iterations in Python">
      Iterations in Python<span class="dot dot--post"> </span>
    </h1>


      <small>
        By <span rel="author">Naelah Nordin</span>
        on <time datetime="2020-08-01T00:00:00+08:00">Aug 1, 2020</time>
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      <small>Iterations in Python</small>


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    <h1 id="using-apply-for-single-column">Using apply for single column</h1>

<figure class="highlight"><pre><code class="language-python" data-lang="python"><span class="k">def</span> <span class="nf">something</span><span class="p">(</span><span class="n">val</span><span class="p">):</span>
    <span class="n">new_value</span> <span class="o">=</span> <span class="n">val</span><span class="o">+</span><span class="s">'something'</span>
    <span class="k">return</span> <span class="n">new_value</span>

<span class="n">df</span><span class="p">[</span><span class="s">'new_column] = df['</span><span class="n">column</span><span class="s">'].apply(lambda x: something(x))</span></code></pre></figure>

<h1 id="using-apply-for-a-whole-row">Using apply for a whole row</h1>

<figure class="highlight"><pre><code class="language-python" data-lang="python"><span class="k">def</span> <span class="nf">something_row</span><span class="p">(</span><span class="n">row</span><span class="p">):</span>
    <span class="n">new_value</span> <span class="o">=</span> <span class="n">row</span><span class="p">[</span><span class="s">'col1'</span><span class="p">]</span><span class="o">+</span><span class="n">row</span><span class="p">[</span><span class="s">'col2'</span><span class="p">]</span>
    <span class="k">return</span> <span class="n">new_value</span>

<span class="n">df</span><span class="p">[</span><span class="s">'new_column] = df.apply(lambda x: something_row(x), axis = 1)</span></code></pre></figure>

<h1 id="fixed-iteration">Fixed iteration</h1>

<figure class="highlight"><pre><code class="language-python" data-lang="python"><span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">5</span><span class="p">):</span>
    <span class="k">print</span><span class="p">(</span><span class="n">i</span><span class="p">)</span></code></pre></figure>


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