AttributeError:无法在python中设置属性 [英] AttributeError: can't set attribute in python

问题描述

这是我的代码

N = namedtuple("N", ['ind', 'set', 'v'])
def solve()
    items=[]
    stack=[]
    R = set(range(0,8))
    for i in range(0,8):
        items.append(N(i,R,8))      
        stack.append(N(0,R-set(range(0,1)),i))
    while(len(stack)>0): 
        node = stack.pop()
        print node
        print items[node.ind]   
        items[node.ind].v = node.v

在最后一行中，我无法根据需要将items[node.ind].v值设置为node.v，并且出现错误

In the last line I cant set the items[node.ind].v value to node.v as I want, and am getting the error

"AttributeError: can't set attribute"

我不知道出了什么问题，但这一定是基于语法的，因为使用node.v+=1之类的语句也显示了相同的错误.我是Python的新手，所以请提出一种使上述更改成为可能的方法.

I don't know what's wrong but it must be something based on syntax as using statements like node.v+=1 is also showing same error. I'm new to Python, so please suggest a way to make the above change possible.

推荐答案

items[node.ind] = items[node.ind]._replace(v=node.v)

(注意:由于函数_replace中的前导下划线，因此不建议使用此解决方案.特别是对于namedtuple，某些函数的前导下划线不是为了表示它们应为私有")

(Note: Don't be discouraged to use this solution because of the leading underscore in the function _replace. Specifically for namedtuple some functions have leading underscore which is not for indicating they are meant to be "private")

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