Python中的动态继承 [英] Dynamic inheritance in Python

问题描述

假设我有2种不同的类实现

Say I have 2 different implementations of a class

class ParentA:
    def initialize(self):
        pass

    def some_event(self):
        pass

    def order(self, value):
        # handle order in some way for Parent A


class ParentB:
    def initialize(self):
        pass

    def some_event(self):
        pass

    def order(self, value):
        # handle order in another for Parent B

如何动态让某些第三类继承自 ParentA 或 ParentB 基于这样的事情？

How can I dynamically let some 3rd class inherit from either ParentA or ParentB based on something like this?

class MyCode:
    def initialize(self):
        self.initial_value = 1

    def some_event(self):
        # handle event
        order(self.initial_value)


# let MyCode inherit from ParentA and run
run(my_code, ParentA)

推荐答案

只需将类对象存储在变量中（在下面的示例中，它名为 base ），并使用 class 语句的base-class-spec中的变量。

Simply store the class-object in a variable (in the example below, it is named base), and use the variable in the base-class-spec of your class statement.

def get_my_code(base):

    class MyCode(base):
        def initialize(self):
          ...

    return MyCode

my_code = get_my_code(ParentA)

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