Returns a list of tuples of (word,# of directories it occurs)

def dir_freq(directory):
    '''Returns a list of tuples of (word,# of directories it occurs)'''
    content = dir_list(directory)
    i = 0
    freqdict = {}
    for filename in content:
        filewords = eliminate_repeats(read_file(directory + '/' + filename))
        for word in filewords:
            if freqdict.has_key(word):
                freqdict[word] += 1
            else:
                freqdict[word] = 1
    tupleize = []
    for key in freqdict.keys():
        wordtuple = (key,freqdict[key])
        tupleize.append(wordtuple)
    return tupleize