title: Convert a Pandas DataFrame to a dictionary
body: <p>I have a DataFrame with four columns. I want to convert this DataFrame to a python dictionary. I want the elements of first column be <code>keys</code> and the elements of other columns in same row be <code>values</code>. </p>
  
  <p>DataFrame:   </p>
  
  <pre><code>    ID   A   B   C
  0   p    1   3   2
  1   q    4   3   2
  2   r    4   0   9  
  </code></pre>
  
  <p>Output should be like this:</p>
  
  <p>Dictionary:</p>
  
  <pre><code>{'p': [1,3,2], 'q': [4,3,2], 'r': [4,0,9]}
  </code></pre>