title: Pandas: Print values of one column based on values of another column
body: <p>Given a dataframe :</p>
  
  <pre><code>    Animal  wings   claws   horns
  0   Ant     No      No      No
  1   Bat     Yes     Yes     No
  2   Cat     No      Yes     No
  </code></pre>
  
  <p>I am trying to print corresponding value of 'Animal' column where the value of given column is 'Yes'.</p>
  
  <p>Eg1: Given column is 'claws', output should be Bat and Cat.</p>
  
  <p>Eg2: Given column is 'wings', output should be Bat</p>