title: Best Method To Substract DataFrame
body: <p>I Have the two following DataFrame :</p>
  
  <pre><code>d1 = pd.DataFrame({'A':[1,2,3],'B':[10,20,30]})
     A   B
  0  1  10
  1  2  20
  2  3  30
  
  d2 = pd.DataFrame({'A':[1,3,2],'B':[10,20,30]})
     A   B
  0  1  10
  1  3  20
  2  2  30
  </code></pre>
  
  <p>I would like substract this two DataFrame <code>d1 - d2</code>, expected result :</p>
  
  <pre><code>   A   B
  0  1  0
  1  3  -10
  2  2  10
  </code></pre>
  
  <p>What is the best method to do that ?
  Could someone help me ?</p>