WordCounter

#!/usr/bin/env python
import sys

def nice_print(li):
    for i in li:
        print i[1][0] , i[0] ,
        for j in i[1][1]:
            print j,
        print

def count_words(filename):
    fin = open(filename, 'r')
    lines = fin.readlines()

    words = []
    for line in lines:
        words += line.split()

    #Tolower
    words = [w.lower() for w in words]

    #remove dup, sort
    removed_dup = sorted(list(set(words)))

    d = {}
    for w in removed_dup:
        #first contain cntr, second is lines
        d[w] = [0, []]

    #count word and line
    for line in lines:
        line_number = lines.index(line) + 1
        for w in line.split():
            lower = w.lower()
            if lower in removed_dup:
                d[lower][0] += 1
                if line_number not in d[lower][1]:
                    d[lower][1].append(line_number)

    #sorted_d = sorted(d.values()[0])
    sorted_d = sorted(d.iteritems() , key = lambda x: (x[1][0] * -1, x[0]))
    nice_print(sorted_d)

def main():
    if len(sys.argv) != 2:
        print 'Use: python wordcount2.py filename'
        sys.exit(1)

    filename = sys.argv[1]
    count_words(filename)

if __name__ == '__main__':
    main()