title: how to find avg of column of csv file
body: <pre><code>import csv
  with open('Met.csv', 'r') as f:
      reader = csv.reader(f, delimiter=':', quoting=csv.QUOTE_NONE)
      for row in reader:
          print row
  </code></pre>
  
  <p>I am not able to go ahead how to get a column from the csv file I tried </p>
  
  <pre><code>print row[:column_name]
  
  name    id  name    reccla  mass (g)    fall    year    GeoLocation
  
  Aachen  1       Valid   L5   21     Fell    01/01/1880 (50.775000, 6.083330)    
  Aarhus  2       Valid   H6  720     Fell    1/1/1951  (53.775000, 6.586560)
  Abee    6       Valid   EH4 --      Fell    1/1/1952 (50.775000, 6.083330)  
  Acapul  10      Valid   A   353      Fell   1/1/1952  (50.775000, 6.083330)
  Acapul  1914    valid   A    --      Fell   1/1/1952 (50.775000, 6.083330)
  AdhiK   379    Valid    EH4 56655    Fell   1/1/1919 (50.775000, 6.083330)
  </code></pre>
  
  <p>and I want avg of mass (g)</p>