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- # Natural Language Toolkit (NLTK) Help
- #
- # Copyright (C) 2001-2019 NLTK Project
- # Authors: Steven Bird <stevenbird1@gmail.com>
- # URL: <http://nltk.org/>
- # For license information, see LICENSE.TXT
-
- """
- Provide structured access to documentation.
- """
- from __future__ import print_function
-
- import re
- from textwrap import wrap
-
- from nltk.data import load
-
-
- def brown_tagset(tagpattern=None):
- _format_tagset("brown_tagset", tagpattern)
-
-
- def claws5_tagset(tagpattern=None):
- _format_tagset("claws5_tagset", tagpattern)
-
-
- def upenn_tagset(tagpattern=None):
- _format_tagset("upenn_tagset", tagpattern)
-
-
- #####################################################################
- # UTILITIES
- #####################################################################
-
-
- def _print_entries(tags, tagdict):
- for tag in tags:
- entry = tagdict[tag]
- defn = [tag + ": " + entry[0]]
- examples = wrap(
- entry[1], width=75, initial_indent=' ', subsequent_indent=' '
- )
- print("\n".join(defn + examples))
-
-
- def _format_tagset(tagset, tagpattern=None):
- tagdict = load("help/tagsets/" + tagset + ".pickle")
- if not tagpattern:
- _print_entries(sorted(tagdict), tagdict)
- elif tagpattern in tagdict:
- _print_entries([tagpattern], tagdict)
- else:
- tagpattern = re.compile(tagpattern)
- tags = [tag for tag in sorted(tagdict) if tagpattern.match(tag)]
- if tags:
- _print_entries(tags, tagdict)
- else:
- print("No matching tags found.")
-
-
- if __name__ == '__main__':
- brown_tagset(r'NN.*')
- upenn_tagset(r'.*\$')
- claws5_tagset('UNDEFINED')
- brown_tagset(r'NN')
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