def print_top(filename):
word_count = count_words(filename)
word_count_pairs = word_count.items()
times.seg_start('sorting start')
word_count_pairs = sorted(word_count_pairs, key = lambda pair: pair[-1], reverse=True)
times.seg_stop('sorting stop')
for i in range(3):
print word_count_pairs[i][0], word_count_pairs[i][1]
times.last_seg()
def count_words(filename):
"""helper method for the other 2, return dict"""
# read file into words
times.seg_start('count words start')
f = open(filename, 'rU')
word_count = {}
for line in f:
words = line.split()
for word in words:
word = word.lower()
if word in word_count: # 0.069 for 640k
#if word_count.get(word): # 0.03s for 250k text, 0.084 for 640k
word_count[word] += 1
else:
word_count[word] = 1
times.seg_stop('count words stop')
return word_count
