英文:
Python compare type of (str, enum) classes
问题
I have multiple enums defined with
from enum import Enum
class EnumA(str, Enum):
RED = "red";
class EnumB(str, Enum):
BLUE = "blue";
How do I compare the type of these classes/enums with say x=EnumA.RED? The following doesn't work.
type(x) is enum
type(x) is EnumType
type(x) is Enum
I don't want to compare the classes directly, since I have a lot of enums.
英文:
I have multiple enums defined with
from enum import Enum
class EnumA(str, Enum):
RED = "red"
class EnumB(str, Enum):
BLUE = "blue"
How do I compare the type of these classes/enums with say x=EnumA.RED? The following doesn't work.
type(x) is enum
type(x) is EnumType
type(x) is Enum
I don't want to compare the classes directly, since I have a lot of enums.
答案1
得分: 4
x 的类型是 EnumA，其他的都不是。
enum是一个模块。EnumType<strike>根本没有定义</strike> 是用来定义Enum的元类。Enum是在enum模块中定义的一个类；它是EnumA的 父 类。
无论如何，永远不要直接比较 type 对象。使用 isinstance 来确定一个值是否是给定类型的。 (用于检查对象的类型时，你实际上几乎不关心一个类和它的超类之间的区别。)
>>> isinstance(x, EnumA)
True
>>> isinstance(x, Enum)
True
后者是真的，因为 EnumA 是 Enum 的子类。
英文:
x has type EnumA, none of the other things.
enumis a module.EnumType<strike>isn't defined at all</strike> is the metaclass used to defineEnum.Enumis a class defined in theenummodule; it's the parent class ofEnumA.
In any case, never compare type objects directly. Use isinstance to determine if a value is of a given type. (For checking the type of an object, you virtually never care about the difference between a class and its superclass(es).)
>>> isinstance(x, EnumA)
True
>>> isinstance(x, Enum)
True
The latter is true because EnumA is a subclass of Enum.
答案2
得分: 1
使用 isinstance：
isinstance(x, Enum)
答案3
得分: 1
要知道变量的类型，你应该将它与EnumA或EnumB进行比较，示例：
type(x) is EnumA
英文:
To know the type of the variable you should compare it with EnumA or EnumB, example :
type(x) is EnumA
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