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from __future__ import absolute_import
import re
from uuid import UUID
from .utils import validator
pattern = re.compile(r'^[0-9a-fA-F]{8}-([0-9a-fA-F]{4}-){3}[0-9a-fA-F]{12}$')
@validator
def uuid(value):
"""
Return whether or not given value is a valid UUID.
If the value is valid UUID this function returns ``True``, otherwise
:class:`~validators.utils.ValidationFailure`.
This validator is based on `WTForms UUID validator`_.
.. _WTForms UUID validator:
https://github.com/wtforms/wtforms/blob/master/wtforms/validators.py
Examples::
>>> uuid('2bc1c94f-0deb-43e9-92a1-4775189ec9f8')
True
>>> uuid('2bc1c94f 0deb-43e9-92a1-4775189ec9f8')
ValidationFailure(func=uuid, ...)
.. versionadded:: 0.2
:param value: UUID value to validate
"""
if isinstance(value, UUID):
return True
try:
return pattern.match(value)
except TypeError:
return False