627c6075a0
Version 3.5 * add support for Python 3.8 * drop support for Python 2 * create NLTK's own Tokenizer class distinct from the Treebank reference tokeniser * update Vader sentiment analyser * fix JSON serialization of some PoS taggers * minor improvements in grammar.CFG, Vader, pl196x corpus reader, StringTokenizer * change implementation <= and >= for FreqDist so they are partial orders * make FreqDist iterable * correctly handle Penn Treebank trees with a unlabeled branching top node. |
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