Mercurial > repos > stevecassidy > nltktools

annotate g_stemmer.py @ 1:fb617586f4b2 draft

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author stevecassidy
date Mon, 05 Dec 2016 05:22:05 -0500
parents e991d4e60c17
children a47980ef2b96
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1 import sys
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2 import os
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3 import nltk
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4 from nltk.stem import *
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5 import argparse
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8 def arguments():
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9 parser = argparse.ArgumentParser(description="Segments the text input into separate sentences")
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10 parser.add_argument('--input', required=True, action="store", type=str, help="input text file")
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11 parser.add_argument('--output', required=True, action="store", type=str, help="output file path")
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12 parser.add_argument('--stemmer', required=False, action="store", type=str, help="output file path")
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13 args = parser.parse_args()
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14 return args
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16 def stem_file(in_file, out_file, stemmer_type):
1
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17 with open(in_file, 'r') as fd:
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18 unsegmented = fd.read()
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19
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20 with open(out_file, 'w') as output:
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21 sentences = nltk.sent_tokenize(unsegmented)
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22 stemmer = get_stemmer(stemmer_type)
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23 for sentence in sentences:
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24 words = nltk.word_tokenize(sentence)
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25 for word in words:
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26 stemmed_word = stemmer.stem(word)
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27 output.write(stemmed_word)
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28 output.write('\n')
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30 def get_stemmer(stemmer_type):
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31 if stemmer_type == 'lancaster':
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32 stemmer = LancasterStemmer()
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33 elif stemmer_type == 'porter':
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34 stemmer = PorterStemmer()
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35 else:
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36 stemmer = snowball.EnglishStemmer()
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37 return stemmer
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38
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39 if __name__ == '__main__':
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40 args = arguments()
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41 stem_file(args.input, args.output, args.stemmer)