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# Natural Language Toolkit (NLTK) Help
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#
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# Copyright (C) 2001-2020 NLTK Project
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# Authors: Steven Bird <stevenbird1@gmail.com>
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# URL: <http://nltk.org/>
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# For license information, see LICENSE.TXT
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"""
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Provide structured access to documentation.
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"""
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import re
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from textwrap import wrap
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from nltk.data import load
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def brown_tagset(tagpattern=None):
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_format_tagset("brown_tagset", tagpattern)
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def claws5_tagset(tagpattern=None):
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_format_tagset("claws5_tagset", tagpattern)
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def upenn_tagset(tagpattern=None):
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_format_tagset("upenn_tagset", tagpattern)
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#####################################################################
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# UTILITIES
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#####################################################################
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def _print_entries(tags, tagdict):
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for tag in tags:
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entry = tagdict[tag]
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defn = [tag + ": " + entry[0]]
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examples = wrap(
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entry[1], width=75, initial_indent=" ", subsequent_indent=" "
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)
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print("\n".join(defn + examples))
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def _format_tagset(tagset, tagpattern=None):
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tagdict = load("help/tagsets/" + tagset + ".pickle")
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if not tagpattern:
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_print_entries(sorted(tagdict), tagdict)
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elif tagpattern in tagdict:
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_print_entries([tagpattern], tagdict)
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else:
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tagpattern = re.compile(tagpattern)
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tags = [tag for tag in sorted(tagdict) if tagpattern.match(tag)]
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if tags:
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_print_entries(tags, tagdict)
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else:
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print("No matching tags found.")
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if __name__ == "__main__":
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brown_tagset(r"NN.*")
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upenn_tagset(r".*\$")
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claws5_tagset("UNDEFINED")
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brown_tagset(r"NN")
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