Plot words from reading a file.

[Isabella Cana]

I need to plot this information. I wrote the code to calculate the frequency of words in a file, but I need it to plot the 15 most frequent words in a bar graph. I really don't even know how to start. Any help?

import string
def compItems((w1,c1), (w2,c2)):
    if c1 > c2:
        return - 1
    elif c1 == c2:
        return cmp(w1, w2)
    else:return 1
def main():
    print "This program analyzes word frequency in a file"
    print "and prints a report on the n most frequent words.\n"

    # get the sequence of words from the file
    fname = raw_input("File to analyze: ")
    text = open(fname,'r').read()
    text = string.lower(text)
    for ch in """!"#$%&()*+,-./:;<=>?@[\\]?_'`{|}?""":
        text = string.replace(text, ch,' ')
        words = string.split(text)

    # construct a dictionary of word counts
    counts = {}
    for w in words:
        try:
            counts[w] = counts[w] + 1
        except KeyError:
            counts[w] = 1

    # output analysis of n most frequent words.
    n = 0
    for words in counts:
        n+=1
    items =counts.items()
    items.sort(compItems)
    for i in range(n):
        print "%-10s%5d" % items[i]

main()