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57 lines
2.4 KiB
Python
57 lines
2.4 KiB
Python
5 years ago
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from __future__ import print_function
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from __future__ import unicode_literals
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from builtins import str, bytes, dict, int
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import os
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import sys
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sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", ".."))
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from pattern.en import wordnet
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from pattern.en import NOUN, VERB
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# WordNet is a lexical database for the English language.
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# It groups English words into sets of synonyms called synsets, provides short, general definitions,
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# and records the various semantic relations between these synonym sets.
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# For a given word, WordNet yields a list of synsets that
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# represent different "senses" in which the word can be understood.
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for synset in wordnet.synsets("train", pos=NOUN):
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print("Description: %s" % synset.gloss) # Definition string.
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print(" Synonyms: %s" % synset.senses) # List of synonyms in this sense.
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print(" Hypernym: %s" % synset.hypernym) # Synset one step higher in the semantic network.
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print(" Hyponyms: %s" % synset.hyponyms()) # List of synsets that are more specific.
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print(" Holonyms: %s" % synset.holonyms()) # List of synsets of which this synset is part/member.
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print(" Meronyms: %s" % synset.meronyms()) # List of synsets that are part/member of this synset.
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print("")
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# What is the common ancestor (hypernym) of "cat" and "dog"?
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a = wordnet.synsets("cat")[0]
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b = wordnet.synsets("dog")[0]
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print("Common ancestor: %s" % wordnet.ancestor(a, b))
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print("")
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# Synset.hypernyms(recursive=True) returns all parents of the synset,
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# Synset.hyponyms(recursive=True) returns all children,
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# optionally up to a given depth.
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# What kind of animal nouns are also verbs?
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synset = wordnet.synsets("animal")[0]
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for s in synset.hyponyms(recursive=True, depth=2):
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for word in s.senses:
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if word in wordnet.VERBS():
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print("%s => %s" % (word, wordnet.synsets(word, pos=VERB)))
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# Synset.similarity() returns an estimate of the semantic similarity to another synset,
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# based on Lin's semantic distance measure and Resnik Information Content.
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# Lower values indicate higher similarity.
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a = wordnet.synsets("cat")[0] # river, bicycle
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s = []
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for word in ["poodle", "cat", "boat", "carrot", "rocket",
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"spaghetti", "idea", "grass", "education",
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"lake", "school", "balloon", "lion"]:
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b = wordnet.synsets(word)[0]
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s.append((a.similarity(b), word))
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print("")
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print("Similarity to %s: %s" % (a.senses[0], sorted(s)))
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print("")
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