title: Remove element from an array in python3
body: <p>In Python3, how can I remove an array element? 
  I have tried, like this:</p>
  
  <pre><code>In [1]: arr=[13,14,67,23,9]
  
  In [2]: arr.remove(2)
  </code></pre>
  
  <p>I want to remove the 3rd position element but it's throwing this error:</p>
  
  <pre><code>---------------------------------------------------------------------------
  ValueError                                Traceback (most recent call last)
  &lt;ipython-input-50-67be49ced0b0&gt; in &lt;module&gt;()
  ----&gt; 1 arr.remove(2)
  
  ValueError: list.remove(x): x not in list
  </code></pre>