title: Python / Pandas: Dataframe subset by filter criteria
body: <p>I have the following dataframe which is list of races and results. </p>
  
  <pre><code>      Date       R   #   Fin  Win
  0     11182017   1   1   2     0 
  1     11182017   1   2   1     5   
  2     11182017   1   3   3     0   
  3     11182017   2   1   2     0   
  4     11182017   2   2   1     10   
  5     11182017   3   1   1     6    
  6     11182017   3   2   2     0   
  </code></pre>
  
  <p>I want to only return the races (all entrants not just the row with 10) where the Win column is greater than or equal to 10. Example below</p>
  
  <pre><code>      Date       R   #   Fin  Win
  3     11182017   2   1   2     0   
  4     11182017   2   2   1     10   
  </code></pre>