我想获得一个子类的类

Question

Can I, in a class that is meant to be subclassed, get the class variable for an instance of its children? Something like this:

class A:
    ...
    def doStuff(self):
        c = getChildClass(self)
        setattr(c, 'anAttribute', value)

There is some interesting memoization I want to do, and this would make the task so much easier.

Answer 1

如果您是指实例本身的类，请使用self.__class__ 。

Answer 2

In [1]: class A(object):
   ...:     def doStuff(self):
   ...:         c = self.__class__
   ...:         print c, c.__name__
   ...:         setattr(c, 'moo', 'meow')

In [2]: class B(A):
   ...:     pass
   ...:

In [3]: B().doStuff()
<class '__main__.B'> B

In [4]: B.moo
Out[4]: 'meow'

So, self.__class__ is what you need.