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"""UUID.""" # standard import re from typing import Union from uuid import UUID # local from .utils import validator @validator def uuid(value: Union[str, UUID], /): """Return whether or not given value is a valid UUID-v4 string. This validator is based on [WTForms UUID validator][1]. [1]: https://github.com/wtforms/wtforms/blob/master/src/wtforms/validators.py#L539 Examples: >>> uuid('2bc1c94f-0deb-43e9-92a1-4775189ec9f8') # Output: True >>> uuid('2bc1c94f 0deb-43e9-92a1-4775189ec9f8') # Output: ValidationError(func=uuid, ...) Args: value: UUID string or object to validate. Returns: (Literal[True]): If `value` is a valid UUID. (ValidationError): If `value` is an invalid UUID. """ if not value: return False if isinstance(value, UUID): return True try: return UUID(value) or re.match( r"^[0-9a-fA-F]{8}-([0-9a-fA-F]{4}-){3}[0-9a-fA-F]{12}$", value ) except ValueError: return False
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