如何从类方法返回枚举元素？

class MyEnum(Enum):
    VALUE1 = 1
    VALUE2 = 2
    
    @classmethod
    def get_value1(cls):
        return cls.VALUE1

value1 = MyEnum.get_value1()
print(value1)  # 输出：MyEnum.VALUE1

class MyEnum(Enum):
    VALUE1 = 1
    VALUE2 = 2
    
    @classmethod
    def get_enum(cls, value):
        if value == 1:
            return cls.VALUE1
        elif value == 2:
            return cls.VALUE2
        else:
            return None

value1 = MyEnum.get_enum(1)
print(value1)  # 输出：MyEnum.VALUE1