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# Natural Language Toolkit: Stemmer Interface
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#
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# Copyright (C) 2001-2020 NLTK Project
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# Author: Trevor Cohn <tacohn@cs.mu.oz.au>
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# Edward Loper <edloper@gmail.com>
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# Steven Bird <stevenbird1@gmail.com>
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# URL: <http://nltk.org/>
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# For license information, see LICENSE.TXT
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from abc import ABCMeta, abstractmethod
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class StemmerI(metaclass=ABCMeta):
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"""
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A processing interface for removing morphological affixes from
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words. This process is known as stemming.
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"""
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@abstractmethod
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def stem(self, token):
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"""
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Strip affixes from the token and return the stem.
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:param token: The token that should be stemmed.
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:type token: str
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"""
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