Mercurial > repos > stevecassidy > nltktools

annotate g_chart_parser.py @ 0:e991d4e60c17 draft

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planemo upload commit 0203cb3a0b40d9348674b2b098af805e2986abca-dirty
author stevecassidy
date Wed, 12 Oct 2016 22:17:53 -0400
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children fb617586f4b2
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e991d4e60c17 planemo upload commit 0203cb3a0b40d9348674b2b098af805e2986abca-dirty
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1 import sys
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2 import nltk
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3 import argparse
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4 from nltk.corpus import PlaintextCorpusReader
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6 def arguments():
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7 parser = argparse.ArgumentParser(description="run NER on a text")
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8 parser.add_argument('--input', required=True, action="store", type=str, help="input text file")
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9 parser.add_argument('--grammar', required=True, action="store", type=str, help="grammar file")
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10 parser.add_argument('--output', required=True, action="store", type=str, help="output file path")
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11 args = parser.parse_args()
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12 return args
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15 def chart_parse(in_file, grammar_file, out_file):
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16 text = unicode(open(in_file, 'r').read(), errors='ignore')
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17 output = open(out_file, 'w')
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18 grammar_string = unicode(open(grammar_file, 'r').read(), errors='ignore')
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19 try:
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20 grammar = nltk.parse_cfg(grammar_string)
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21 parser = nltk.ChartParser(grammar)
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22 sentences = nltk.sent_tokenize(text)
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23 for sentence in sentences:
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24 words = nltk.word_tokenize(sentence)
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25 tree = parser.parse(words)
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26 output.write(tree.pprint())
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27 output.write('\n')
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28 except Exception, e:
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29 message = "Error with parsing. Check the input files are correct and the grammar contains every word in the input sequence. \n----\n" + str(e)
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30 sys.stderr.write(message)
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31 sys.exit()
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32 output.close()
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34 if __name__ == '__main__':
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35 args = arguments()
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36 chart_parse(args.input, args.grammar, args.output)
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