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import six
from .utils import validator
@validator
def truthy(value):
"""
Validate that given value is not a falsey value.
This validator is based on `WTForms DataRequired validator`_.
.. _WTForms DataRequired validator:
https://github.com/wtforms/wtforms/blob/master/wtforms/validators.py
Examples::
>>> truthy(1)
True
>>> truthy('someone')
True
>>> truthy(0)
ValidationFailure(func=truthy, args={'value': 0})
>>> truthy(' ')
ValidationFailure(func=truthy, args={'value': ' '})
>>> truthy(False)
ValidationFailure(func=truthy, args={'value': False})
>>> truthy(None)
ValidationFailure(func=truthy, args={'value': None})
.. versionadded:: 0.2
"""
return (
value and
(not isinstance(value, six.string_types) or value.strip())
)