title: How To Average Top Or Bottom 'n' Values In Python
body: <p>How do you calculate an average top or bottom 'n' Values in Python? Example below, column = c2 calculates the average of the top 2 in the last 4 days.</p>
  
  <pre><code>c0     c1     c2
  1     2      na
  2     2      na
  3     3      na
  4     5      4
  5     6      5.5
  6     7      6.5
  7     5      6.5
  8     4      6.5
  9     5      6
  10    5      5
  </code></pre>