如何在python中返回类的定义? [英] How do I return the definition of a class in python?

问题描述

说我有一个"NumberStore"类

Say I have a class "NumberStore"

class NumberStore(object):
    def __init__(self, num):
        self.num = num

    def get(self):
        return self.num

然后，出于序列化的目的，我想打印类的定义，该定义完全相同或相同. python中有什么方法可以访问类的定义，如下面的理想示例所示?

And later on, for the purpose of serialization, I want to print a definition of the class, either exactly as stated, or equivalently stated. Is there any way in python to access a class's definition as in the idealized example below?

>>> NumberStore.print_class_definition()
"class NumberStore(object):\n    def __init__(self, num):\n        self.num = num\n    \n    def get(self):\n        return self.num"

推荐答案

是的，使用

Yep, with inspect.getsource:

from inspect import getsource

class NumberStore(object):
    def __init__(self, num):
        self.num = num

    def get(self):
        return self.num

    @classmethod
    def print_class_definition(cls):
        return getsource(cls)

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