Python: Count Word Frequency

By Xah Lee. Date: . Last updated: .

Here's a script that computes frequency of words in file.

The input file is typically a novel, fiction, essay, etc.

# Python 3

# count the occurence of words in a file
# prints words with their counts

# to use, save this file as word_freq.py, edit the line filePath, then run “python word_freq.py”

# 2006-10-27 http://xahlee.info/python/python_word_frequency.html

import re, operator

filePath = "/Users/xah/web/xahlee_info/python/python_word_frequency.html"

# keys are words, vals are occurance frequency
freqlist={}

inF = open(filePath, "r", encoding="utf-8")
s=inF.read()
inF.close()

s=s.lower()

wordlist = re.split(r'\W',s);
for wd in wordlist:
     if wd in freqlist:
         freqlist[wd]=freqlist[wd]+1
     else:
         freqlist[wd]=1

for k,v in sorted(freqlist.items(), key=operator.itemgetter(1) ,reverse=True):
    print(str(v) + " → " + k)

Output:

Here's python 2:

# -*- coding: utf-8 -*-
# Python

# count the occurence of words in a file
# prints words with their counts

# to use, save this file as word_freq.py, edit the line filePath, then run “python word_freq.py”

# 2006-10-27 http://xahlee.info/python/python_word_frequency.html

import re, operator

filePath = "/Users/xah/web/xahlee_info/python/python_word_frequency.html"

# keys are words, vals are occurance frequency
freqlist={}

inF = open(filePath,'rb')
s=unicode(inF.read(),'utf-8')
inF.close()

s=s.lower()

wordlist = re.split(r'\W',s);
for wd in wordlist:
     # if freqlist.has_key(wd):
     if wd in freqlist:
         freqlist[wd]=freqlist[wd]+1
     else:
         freqlist[wd]=1

for k,v in sorted(freqlist.items(), key=operator.itemgetter(1) ,reverse=True):
    print str(v) + u" → " + k.encode('utf-8')

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