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Cache validity of a locale name #1254

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Cache validity of a locale name #1254

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3 changes: 2 additions & 1 deletion babel/localedata.py
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Original file line number Diff line number Diff line change
Expand Up @@ -60,6 +60,7 @@ def resolve_locale_filename(name: os.PathLike[str] | str) -> str:
return os.path.join(_dirname, f"{name}.dat")


@lru_cache(maxsize=None)
def exists(name: str) -> bool:
"""Check whether locale data is available for the given locale.

Expand All @@ -72,7 +73,7 @@ def exists(name: str) -> bool:
if name in _cache:
return True
file_found = os.path.exists(resolve_locale_filename(name))
return True if file_found else bool(normalize_locale(name))
return file_found or bool(normalize_locale(name))


@lru_cache(maxsize=None)
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4 changes: 2 additions & 2 deletions tests/test_localedata.py
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Expand Up @@ -109,10 +109,10 @@ def test_locale_argument_acceptance():
assert normalized_locale is None
assert not localedata.exists(None)

# Testing list input.
# Testing tuple input.
normalized_locale = localedata.normalize_locale(['en_us', None])
assert normalized_locale is None
assert not localedata.exists(['en_us', None])
assert not localedata.exists(('en_us', None))


def test_locale_identifiers_cache(monkeypatch):
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