Python word count and rank

Question

Working on a word occurrence count application in a Python 3.2 / Windows environment.

Can anyone please help to tell me why the following isn't working?

from string import punctuation
from operator import itemgetter

N = 100
words = {}

words_gen = (word.strip(punctuation).lower() for line in open("poi_run.txt")
                                         for word in line.split())

for word in words_gen:
    words[word] = words.get(word, 0) + 1

top_words = (words.iteritems(), key=itemgetter(1), reverse=True)[:N]

for word, frequency in top_words:
    print ("%s %d") % (word, frequency)

The trace back error is:

Message File Name   Line    Position    
Traceback               
    <module>    C:\Users\will\Desktop\word_count.py 13      
AttributeError: 'dict' object has no attribute 'iteritems'              

Thanks

n.b.

Fully working code:

from string import punctuation
from operator import itemgetter

N = 100
words = {}

words_gen = (word.strip(punctuation).lower() for line in open("poi_run.txt")
                                         for word in line.split())

for word in words_gen:
    words[word] = words.get(word, 0) + 1

top_words = sorted(words.items(), key=itemgetter(1), reverse=True)[:N]

for word, frequency in top_words:
    print ("%s %d" % (word, frequency))

Thanks again guys

Answer 1

In Python 3, use just items where you'd previously use iteritems.

The new items() returns a dictionary view object that supports iteration as well as len and in.

And of course, in top_words = (words.iteritems(), ... you forgot to call the sorted function.

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Edit: Please see my other answer for a better solution.