Histogram 2

histogram.py

#!/usr/bin/env python
import operator
import re


def histogram_for(text):
    text = re.sub('[!@#$-]', '', text)
    words = text.lower().split()
    frequency = {}
    for word in words:
        if word in frequency:
            frequency[word] += 1
        else:
            frequency[word] = 1

    return dict(sorted(frequency.items(), key=operator.itemgetter(1)))


def print_histogram(histogram):
    for key, value in histogram.iteritems():
        print "{0}: {1}".format(key, value)


if __name__ == '__main__':
    text = "I was 09809 home -- Yes! yes!  You was"

    print_histogram(histogram_for(text))