truthiness in python

truthiness.py

class WithTruthiness(object):
    """docstring for WithoutBool"""
    def __init__(self, arg):
        super(WithTruthiness, self).__init__()
        self.arg = arg

    def __nonzero__(self):
        if self.arg:
            return True
        else:
            return False

    def __bool__(self):
        return self.__nonzero__()


class WithoutTruthiness(object):
    """docstring for WithoutTruthiness"""
    def __init__(self, arg):
        super(WithoutTruthiness, self).__init__()
        self.arg = arg


if __name__ == '__main__':
    hasNotTruthinessTrue = WithoutTruthiness(True)
    hasNotTruthinessFalse = WithoutTruthiness(False)
    hasTruthinessTrue = WithTruthiness(True)
    hasTruthinessFalse = WithTruthiness(False)

    if hasNotTruthinessTrue:
        print "hasNotTruthinessTrue is True"
    if hasTruthinessTrue:
        print "hasTruthinessTrue is True"

    if hasNotTruthinessFalse:
        print "hasNotTruthinessFalse is True"
    if hasTruthinessFalse:
        print "hasTruthinessFalse is True"

    """
    hasNotTruthinessTrue is True
    hasTruthinessTrue is True
    hasNotTruthinessFalse is True
    """