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26 lines
818 B
Python
26 lines
818 B
Python
import typing as t
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import abc
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from ..database.datatypes import TextReview, TokenizedReview
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class BaseTokenizer(metaclass=abc.ABCMeta):
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"""
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The base for all tokenizers in this project.
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"""
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def __repr__(self):
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return f"<{self.__class__.__qualname__}>"
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@abc.abstractmethod
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def tokenize(self, text: str) -> t.Iterator[str]:
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"""
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Convert a text `str` into another `str` containing a series of whitespace-separated tokens.
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"""
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raise NotImplementedError()
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def tokenize_review(self, review: TextReview) -> TokenizedReview:
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"""
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Apply `.tokenize` to the text of a `TextReview`, converting it in a `TokenizedReview`.
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"""
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tokens = self.tokenize(review.text)
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return TokenizedReview(rating=review.rating, tokens=tokens)
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