Analayze Da Tubes

#!/usr/bin/python

import sys
import subprocess as sub


def wordList(input):
    popCloud = ( "cat %s |"
                 "tr -cs A-Za-z '\n' |"
                 "tr A-Z a-z |"
                 "sort |"
                 "uniq -c |"
                 "sort -rn"
                 % (input)
               )

    p = sub.Popen( popCloud, shell=True, stdout=sub.PIPE, stderr=sub.PIPE )
    output, errors = p.communicate()
    return [word.strip() for word in output.split('\n')]

def wordDict(wordList):
    wordDict = {}
    for w in wordList:
        if len(w) > 4:
            k,v = w.split(' ')
            wordDict[v] = k
    return wordDict

def rmShortWords(wordList,length):
    li = []
    for p, w in enumerate(wordList):
        if len(w.split(' ')[-1]) >= length:
            li.append(w)
    return li

def main():
    list = wordList(sys.argv[1])
    dictionary = wordDict(list)
    shortList = rmShortWords(list,20)
    print shortList

if __name__ == "__main__":
    main()