def failed(obj):
    """Return a Boolean that indicates if the value is an instance of smonad.types.ftry.Failure

    >>> from smonad.types.ftry import Failure, Success
    >>> failed(Failure('shit is fucked up'))
    True
    >>> failed(Success('it worked!'))
    False
    """
    from smonad.types.ftry import Try, Failure
    assert isinstance(obj, Try)
    return isinstance(obj, Failure)
