nltk.ContextIndex¶
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class
nltk.ContextIndex(tokens, context_func=None, filter=None, key=<function <lambda>>)[source]¶ A bidirectional index between words and their ‘contexts’ in a text. The context of a word is usually defined to be the words that occur in a fixed window around the word; but other definitions may also be used by providing a custom context function.
Methods¶
__init__(tokens[, context_func, filter, key]) |
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common_contexts(words[, fail_on_unknown]) |
Find contexts where the specified words can all appear; and return a frequency distribution mapping each context to the number of times that context was used. | ||
similar_words(word[, n]) |
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tokens() |
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word_similarity_dict(word) |
Return a dictionary mapping from words to ‘similarity scores,’ indicating how often these two words occur in the same context. |