title: How to sort pandas dataframe by custom order on string index
body: <p>I have the following data frame:</p>
  
  <pre><code>import pandas as pd
  
  # Create DataFrame
  df = pd.DataFrame(
  {'id':[2967, 5335, 13950, 6141, 6169],\
   'Player': ['Cedric Hunter', 'Maurice Baker' ,\
              'Ratko Varda' ,'Ryan Bowen' ,'Adrian Caldwell'],\
   'Year': [1991 ,2004 ,2001 ,2009 ,1997],\
   'Age': [27 ,25 ,22 ,34 ,31],\
   'Tm':['CHH' ,'VAN' ,'TOT' ,'OKC' ,'DAL'],\
   'G':[6 ,7 ,60 ,52 ,81]})
  
  
  df.set_index('Player', inplace=True)
  </code></pre>
  
  <p>It shows:</p>
  
  <pre><code>Out[128]:
  
                   Age   G   Tm  Year     id
  Player
  Cedric Hunter     27   6  CHH  1991   2967
  Maurice Baker     25   7  VAN  2004   5335
  Ratko Varda       22  60  TOT  2001  13950
  Ryan Bowen        34  52  OKC  2009   6141
  Adrian Caldwell   31  81  DAL  1997   6169
  </code></pre>
  
  <p>What I want to do is to sort the 'Player' index in the arbitrary order according to this list (NOTE: not alphabetical order):</p>
  
  <pre><code>reorderlist = [ 'Maurice Baker', 'Adrian Caldwell','Ratko Varda' ,'Ryan Bowen' ,'Cedric Hunter']
  </code></pre>
  
  <p>How can I do that?</p>