python - How to create an instance by using the name of the class of another instance in python?

Question

I am trying to do something that looks something like this:

class Foo:
    def __init__(self, x, y):
        print(x + y)

a = Foo(10,20)
b = a.CLASSTYPE(20,30)

(Note: I know that there is nothing such as CLASSTYPE)

Is something like this possible? And if it is, how could I implement it in python. Anything would be greatly appreciated, thanks!

标签： pythonpython-3.xclassoop

Answer 1

您可以简单地获取类型的引用a，然后调用它：

b = type(a)(20, 30)

还有a.__class__，但您通常应避免直接使用所谓的 dunder 名称（名称以双下划线开头和结尾）。