title: search max value in multiple csv files
body: <p>Please excuse the beginner's question; I have search the site but similar questions seem to involve SQL and I would like to learn how to do this with Python alone. </p>
  
  <p>Ok, so I have figured out how to print the max value with cvs.reader </p>
  
  <p>Here is my code so far: </p>
  
  <pre><code>with open('/users/user/Documents/test.csv', 'rU') as f:
  f_csv = csv.reader(f, delimiter=',')
  for row in f_csv:
      max_row = max(csv.reader(f), key=op.itemgetter(0))
      print max_row
  </code></pre>
  
  <p>This return the row with the highest value in my csv file
  But what I truly need is to compare multiple csv files and to find the max value in all of them (or better yet, the top 5), and return not the row but the name of the file. 
  For example, if I have 2 csv files, with the name and age of students in two separate classes, the code will find the max value and return the class with the oldest student in it (file name). </p>
  
  <p>Can anyone please help? Thanks!</p>
  
  <p>Andre</p>