python：如何从其中引用类（如递归函数） [英] python: how to refer to the class from within it ( like the recursive function)

问题描述

对于递归函数，我们可以执行以下操作：

For a recursive function we can do:

def f(i):
  if i<0: return
  print i
  f(i-1)

f(10)

但是有什么方法可以做以下事情？

However is there a way to do the following thing?

class A:
  # do something
  some_func(A)
  # ...

推荐答案

在Python中，您不能在类主体中引用该类，尽管在Ruby之类的语言中也可以引用它。

In Python you cannot reference the class in the class body, although in languages like Ruby you can do it.

在Python中，您可以使用类装饰器，但在类初始化后将被调用。另一种方法是使用元类，但这取决于您要实现的目标。

In Python instead you can use a class decorator but that will be called once the class has initialized. Another way could be to use metaclass but it depends on what you are trying to achieve.

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