如何(在运行时)检查一个类是否是另一个类的子类?

比方说，我有一个西服套装和四个西服套装子类别:Heart，Spade，Diamond和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，该方法接收西服作为参数，这是一个类对象，而不是实例.更准确地说，它可能仅接收以下四个值之一:Heart，Spade，Diamond，Club.我该如何做出保证这种事情的断言?像这样:

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)
   ...

我正在使用Python 3.

I'm using Python 3.