title: Seaborn.countplot : order categories by count, also by category?
body: <p>So I understand how to sort in regards to a barchart (ie <a href="https://stackoverflow.com/questions/46623583/seaborn-countplot-order-categories-by-count">here</a>). What I can not find though is how to sort the bar charts by one of the subcategories.</p>
  
  <p>For example, given the following dataframe, I can get the bar plots. But what I would like to do, is have it sorted from greatest to least, by <code>Type</code> of <code>Classic</code>). </p>
  
  <pre><code>import pandas as pd
  
  test_df = pd.DataFrame([
  ['Jake',    38, 'MW',   'Classic'],
  ['John',    38,'NW',    'Classic'],
  ['Sam', 34, 'SE',   'Classic'],
  ['Sam', 22, 'E' ,'Classic'],
  ['Joe', 43, 'ESE2', 'Classic'],
  ['Joe', 34, 'MTN2', 'Classic'],
  ['Joe', 38, 'MTN2', 'Classic'],
  ['Scott',   38, 'ESE2', 'Classic'],
  ['Chris',   34, 'SSE1', 'Classic'],
  ['Joe', 43, 'S1',   'New'],
  ['Paul',    34, 'NE2',  'New'],
  ['Joe', 38, 'MC1',  'New'],
  ['Joe', 34, 'NE2',  'New'],
  ['Nick',    38, 'MC1',  'New'],
  ['Al',  38, 'SSE1', 'New'],
  ['Al',  34, 'ME',   'New'],
  ['Al',  34, 'MC1',  'New'],
  ['Joe', 43, 'S1',   'New']], columns = ['Name','Code_A','Code_B','Type'])
  
  
  import seaborn as sns
  sns.set(style="darkgrid")
  palette ={"Classic":"#FF9999","New":"#99CC99"}
  
  
  g = sns.countplot(y="Name",
                    palette=palette,
                    hue="Type",
                    data=test_df)
  </code></pre>
  
  <p>So instead of:</p>
  
  <p><a href="https://i.stack.imgur.com/cNbJE.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/cNbJE.png" alt="enter image description here"></a></p>
  
  <p>'Joe' would be on top, followed by 'Sam', etc.</p>