Show wordfreqs_skel.py syntax highlighted
#!/usr/bin/env python
"""Word frequencies - count word frequencies in a string."""
def word_freq(text):
"""Return a dictionary of word frequencies for the given text."""
# XXX you need to write this
def print_vk(lst):
"""Print a list of value/key pairs nicely formatted in key/value order."""
# Find the longest key: remember, the list has value/key paris, so the key
# is element [1], not [0]
longest_key = max(map(lambda x: len(x[1]),lst))
# Make a format string out of it
fmt = '%'+str(longest_key)+'s -> %s'
# Do actual printing
for v,k in lst:
print fmt % (k,v)
def freq_summ(freqs,n=10):
"""Print a simple summary of a word frequencies dictionary.
Inputs:
- freqs: a dictionary of word frequencies.
Optional inputs:
- n: the number of """
words,counts = # XXX look at the keys and values methods of dicts
# Sort by count
items = # XXX think of a list, look at zip() and think of sort()
print 'Number of words:',len(freqs)
print
print '%d least frequent words:' % n
print_vk(items[:n])
print
print '%d most frequent words:' % n
print_vk(items[-n:])
if __name__ == '__main__':
text = # XXX
# You need to read the contents of the file HISTORY.gz. Do NOT unzip it
# manually, look at the gzip module from the standard library and the
# read() method of file objects.
freqs = word_freq(text)
freq_summ(freqs,20)
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