title: How to get rid of "Unnamed: 0" column in a pandas DataFrame read in from CSV file?
body: <p>I have a situation wherein sometimes when I read a <code>csv</code> from <code>df</code> I get an unwanted index-like column named <code>unnamed:0</code>. </p>
  
  <p><code>file.csv</code></p>
  
  <p></p>
  
  <pre><code>,A,B,C
  0,1,2,3
  1,4,5,6
  2,7,8,9
  </code></pre>
  
  <p>The CSV is read with this:</p>
  
  <pre><code>pd.read_csv('file.csv')
  
     Unnamed: 0  A  B  C
  0           0  1  2  3
  1           1  4  5  6
  2           2  7  8  9
  </code></pre>
  
  <p>This is very annoying! Does anyone have an idea on how to get rid of this?</p>