Python从int继承实现枚举，pythonint枚举,枚举可以给数字一个可读的

Python从int继承实现枚举，pythonint枚举,枚举可以给数字一个可读的

枚举可以给数字一个可读的名称，在Python中可以从int继承来实现枚举：

"""Enumeration class representing a named integer."""class Enum(int):    """Enumeration value is a named integer."""    #pylint: disable=R0904    def __new__(cls, rank, name):        obj = int.__new__(cls, rank)        obj.name = name        return obj    def __repr__(self):        return 'Enum(' + repr(int(self)) + ', ' + repr(self.name) + ')'    @staticmethod    def lookup(enumvals):        """Lookup from int/string to Enum instance for provided values"""        result = {int(v): v for v in enumvals}        result.update({v.name: v for v in enumvals})        return resultdef test():    """Tests of the Enum class"""    # pylint: disable=C0103    WEAK = Enum(1, 'WEAK')    MODERATE = Enum(2, 'MODERATE')    STRONG = Enum(3, 'STRONG')    assert repr(STRONG) == "Enum(3, 'STRONG')"    assert WEAK < MODERATE < STRONG    assert MODERATE > WEAK    assert WEAK.name == 'WEAK'    assert WEAK == 1    assert WEAK < 3if __name__ == '__main__':    test()