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File: //opt/alt/python35/lib/python3.5/site-packages/attr/__pycache__/validators.cpython-35.opt-1.pyc


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Commonly useful validators.
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    A validator that raises a :exc:`TypeError` if the initializer is called
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    :param type: The type to check for.
    :type type: type or tuple of types

    :raises TypeError: With a human readable error message, the attribute
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    A validator that raises a :exc:`TypeError` if the initializer is called
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    <https://zopeinterface.readthedocs.io/en/latest/>`_).

    :param zope.interface.Interface interface: The interface to check for.

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    A validator that makes an attribute optional.  An optional attribute is one
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    :param validator: A validator (or a list of validators) that is used for
        non-``None`` values.
    :type validator: callable or :class:`list` of callables.

    .. versionadded:: 15.1.0
    .. versionchanged:: 17.1.0 *validator* can be a list of validators.
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    A validator that raises a :exc:`ValueError` if the initializer is called
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    performed using ``value in options``.

    :param options: Allowed options.
    :type options: list, tuple, :class:`enum.Enum`, ...

    :raises ValueError: With a human readable error message, the attribute (of
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    .. versionadded:: 17.1.0
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