title: python, sort descending dataframe with pandas
body: <p>I'm trying to sort a dataframe by descending.
  I put 'False' in the ascending argument, but my order is still ascending.</p>
  
  <p>My code is:</p>
  
  <pre><code>from pandas import DataFrame
  import pandas as pd
  
  d = {'one':[2,3,1,4,5],
       'two':[5,4,3,2,1],
       'letter':['a','a','b','b','c']}
  
  df = DataFrame(d)
  
  test = df.sort(['one'], ascending=[False])
  </code></pre>
  
  <p>but the output is</p>
  
  <pre><code>  letter  one  two
  2      b    1    3
  0      a    2    5
  1      a    3    4
  3      b    4    2
  4      c    5    1
  </code></pre>