有没有一种方法可以检查两个对象在python中每个变量中是否包含相同的值? [英] Is there a way to check if two object contain the same values in each of their variables in python?

问题描述

如何检查a的两个实例

class FooBar(object):
    __init__(self, param):
        self.param = param
        self.param_2 = self.function_2(param)
        self.param_3 = self.function_3()

一样吗?相同是指它们所有变量的值都相同.

are identical? By identical I mean they have the same values in all of their variables.

a = FooBar(param)
b = FooBar(param)

我想到了

if a == b:
    print "a and b are identical"!

这样做会没有副作用吗?

Will this do it without side effects?

我的问题的背景是单元测试.我想实现以下目标:

The background for my question is unit testing. I want to achieve something like:

self.failUnlessEqual(self.my_object.a_function(), another_object)

推荐答案

如果您希望==工作，请在您的类中实现__eq__方法以执行丰富的比较.

If you want the == to work, then implement the __eq__ method in your class to perform the rich comparison.

如果您只想比较 all 属性的相等性，则可以通过比较每个对象中的__dict__来简洁地做到这一点:

If all you want to do is compare the equality of all attributes, you can do that succinctly by comparison of __dict__ in each object:

class MyClass:

    def __eq__(self, other) : 
        return self.__dict__ == other.__dict__

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