title: Filter a dictionary of lists in Python
body: <p>I have the following dictionary:</p>
  
  <pre><code>dict = {'Sex':['Male','Male','Female','Female','Male'],
          'Height': [100,200,150,80,90],
          'Weight': [20,60,40,30,30]}
  </code></pre>
  
  <p>I'd like to be able to filter that dictionary using a condition on one key. For example, if I want to keep Male only:</p>
  
  <pre><code>new_dict = {'Sex':['Male','Male','Male'],
              'Height': [100,200,90],
              'Weight': [20,60,30]}
  </code></pre>