def best_match(requested_langs: LanguageAccept,
supported_langs: list) -> Optional[str]:
result = requested_langs.best_match(supported_langs)
if result is None:
# Try again with just the language codes (no country/region codes).
requested = []
for code, weight in requested_langs:
code = code.split("-")[0]
requested.append((code, weight))
supported_shorted = [code.split("-")[0] for code in supported_langs]
result = LanguageAccept(requested).best_match(supported_shorted)
# If match, convert back to the full language code.
if result:
idx = supported_shorted.index(result)
result = supported_langs[idx]
return result
def test_best_match_fallback(self, values, matches, default, expect):
accept = LanguageAccept(values)
best = accept.best_match(matches, default=default)
assert best == expect
