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Analyzing a Tagged Corpus

The analyze_tagged_corpus.py script will show the following statistics about a tagged corpus:

  • total number of words
  • number of unique words
  • number of tags
  • the number of times each tag occurs

Example output can be found in Analyzing Tagged Corpora and NLTK Part of Speech Taggers.

To analyze the treebank corpus:
python analyze_tagged_corpus.py treebank
To sort the output by tag count from highest to lowest:
python analyze_tagged_corpus.py treebank --sort count --reverse
To see simplified tags, instead of standard tags:
python analyze_tagged_corpus.py treebank --simplify_tags
To analyze a custom corpus, whose fileids end in ".pos", using a TaggedCorpusReader:
python analyze_tagged_corpus.py /path/to/corpus --reader nltk.corpus.reader.tagged.TaggedCorpusReader --fileids '.+\.pos'

The corpus path can be absolute, or relative to a nltk_data directory. For example, both corpora/treebank/tagged and /usr/share/nltk_data/corpora/treebank/tagged will work.

For a complete list of usage options:
python analyze_tagged_corpus.py --help