ValueError:字典更新序列元素#0的长度为1；从文件读取时需要2 [英] ValueError: dictionary update sequence element #0 has length 1; 2 is required while reading from file

问题描述

我正在尝试从文件中读取字典，然后将字符串变成字典.我有这个，

I'm trying to read a dictionary off a file and then make the string into a dictionary. I have this,

with open("../resources/enemyStats.txt", "r") as stats:
        for line in stats:
            if self.kind in line:
                line  = line.replace(self.kind + " ", "")
                line = dict(line)
                return line

和txt文件中的行是

slime {'hp':5,'speed':1}

我希望能够返回一个字典，以便我可以轻松访问敌方角色的hp和其他值.

I'd like to be able to return a dict so that I can easily access the hp and other values for the enemy character.

推荐答案

dict()不会解析Python字典文字语法；它不会接受字符串并解释其内容.它只能使用另一本字典或键值对序列，而您的行不符合这些条件.

dict() does not parse Python dictionary literal syntax; it won't take a string and interpret its contents. It can only take another dictionary or a sequence of key-value pairs, your line doesn't match those criteria.

您需要使用 ast.literal_eval()函数代替这里:

You'll need to use the ast.literal_eval() function instead here:

from ast import literal_eval

if line.startswith(self.kind):
    line = line[len(self.kind) + 1:]
    return literal_eval(line)

我也对self.kind的检测进行了一些调整；我假设如果要在行的开头找到self.kind，则希望与之匹配.

I've also adjusted the detection of self.kind a little; I'm assuming you wanted to match it if self.kind is found at the start of the line.

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