30 lines
860 B
Python
30 lines
860 B
Python
from __future__ import annotations
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from string import ascii_letters
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from typing import NamedTuple
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class UnknownLocaleError(Exception):
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pass
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class Locale(NamedTuple):
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language: str
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territory: str = ''
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def __str__(self):
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if self.territory:
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return f'{self.language}_{self.territory}'
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return self.language
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@classmethod
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def parse(cls, identifier, sep):
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if not isinstance(identifier, str):
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raise TypeError(f"Unexpected value for identifier: '{identifier}'")
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locale = cls(*identifier.split(sep, 1))
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if not all(x in ascii_letters for x in locale.language):
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raise ValueError(f"expected only letters, got '{locale.language}'")
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if len(locale.language) != 2:
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raise UnknownLocaleError(f"unknown locale '{locale.language}'")
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return locale
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