title: Extracting single value from column in pandas
body: <p>I have a simple pandas question regarding extracting a single column value</p>
  
  <pre><code>df = DataFrame({'A' : [15,56,23,84], 'B' : [10,20,33,25]})
  df
  
       A    B
  0    15   10
  1    56   20
  2    23   33
  3    84   55
  
  x = df[df['A'] == 23]
  x
  </code></pre>
  
  <p>outputs   </p>
  
  <pre><code>    A    B
  2  23    33
  </code></pre>
  
  <p>However, I only want to get the value in column B i.e. 33. How do I get that?</p>