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POCounting every word in a text file only once using python
 

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  1. POCounting every word in a text file only once using python
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    <p>I have a small python script I am working on for a class homework assignment. The script reads a file and prints the 10 most frequent and infrequent words and their frequencies. For this assignment, a word is defined as 2 letters or more. I have the word frequencies working just fine, however the third part of the assignment is to print the total number of <strong>unique</strong> words in the document. Unique words meaning count every word in the document, <strong>only once.</strong></p> <p>Without changing my current script too much, how can I count all the words in the document only one time?</p> <p><strong>p.s. I am using Python 2.6 so please don't mention the use of collections.Counter</strong></p> <pre><code>from string import punctuation from collections import defaultdict import re number = 10 words = {} total_unique = 0 words_only = re.compile(r'^[a-z]{2,}$') counter = defaultdict(int) """Define words as 2+ letters""" def count_unique(s): count = 0 if word in line: if len(word) &gt;= 2: count += 1 return count """Open text document, read it, strip it, then filter it""" txt_file = open('charactermask.txt', 'r') for line in txt_file: for word in line.strip().split(): word = word.strip(punctuation).lower() if words_only.match(word): counter[word] += 1 # Most Frequent Words top_words = sorted(counter.iteritems(), key=lambda(word, count): (-count, word))[:number] print "Most Frequent Words: " for word, frequency in top_words: print "%s: %d" % (word, frequency) # Least Frequent Words: least_words = sorted(counter.iteritems(), key=lambda (word, count): (count, word))[:number] print " " print "Least Frequent Words: " for word, frequency in least_words: print "%s: %d" % (word, frequency) # Total Unique Words: print " " print "Total Number of Unique Words: %s " % total_unique </code></pre>
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    1. USTy Bailey
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    1. CONumber of keys in the `counter` dictionary?
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      1. USmadth3
    2. COIs this different from [Retrieving total number of words with 2 or more letters in a document using python](http://stackoverflow.com/questions/12482844) that you asked yesterday?
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      1. USJames Waldby - jwpat7
    3. COyes, this is different. read the questions
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      1. USTy Bailey
 

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