cdsboy

from operator import itemgetter
import re
import sys

def make_dict(text):
  word_dict = {}

  p = re.compile('\\b\w{1,20}\'{0,1}\\w{0,10}\\b')

  for line in text:
    m = p.finditer(line)
    for item in m:
      if line[item.start():item.end()] not in word_dict:
        word_dict[line[item.start():item.end()]] = 1
      else:
        word_dict[line[item.start():item.end()]] += 1

  return word_dict

def sort_dict(word_dict):
  return sorted(word_dict.iteritems(), key=itemgetter(1), reverse=True)

def main(argv):
  text = open(argv[1], 'r')

  word_dict = make_dict(text)
  text.close()

  word_list = sort_dict(word_dict)

  print word_list[:int(argv[2])]

if __name__ == '__main__':
  main(sys.argv)