如何检查(在运行时)一个类是否是另一个类的子类? [英] How do I check (at runtime) if one class is a subclass of another?

问题描述

假设我有一个套装和四个子套装:Heart、Spade、Diamond、Club.

Let's say that I have a class Suit and four subclasses of suit: Heart, Spade, Diamond, Club.

class Suit:
   ...
class Heart(Suit):
   ...
class Spade(Suit):
   ...
class Diamond(Suit):
   ...
class Club(Suit):
   ...

我有一个方法，它接收西装作为参数，它是一个类对象，而不是一个实例.更准确地说，它可能只接收四个值之一:Heart、Spade、Diamond、Club.我怎样才能做出保证这样事情的断言?类似的东西:

I have a method which receives a suit as a parameter, which is a class object, not an instance. More precisely, it may receive only one of the four values: Heart, Spade, Diamond, Club. How can I make an assertion which ensures such a thing? Something like:

def my_method(suit):
   assert(suit subclass of Suit)
   ...

我使用的是 Python 3.

I'm using Python 3.

推荐答案

你可以像这样使用 issubclass() assert issubclass(suit, Suit).

You can use issubclass() like this assert issubclass(suit, Suit).

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