如何解析字典字符串？ [英] How can I parse a dictionary string?

问题描述

我正在尝试使用 dict 函数将字符串转换为字典，像这样

I am trying to convert a string to a dictionary with dict function, like this

import json
p = "{'id':'12589456'}"
d = dict(p)
print d['id']  

但是出现以下错误

ValueError: dictionary update sequence element #0 has length 1; 2 is required

为什么会失败？我该如何解决？

Why does it fail? How can I fix this?

推荐答案

您拥有的是字符串，但 dict 函数只能遍历元组（键值对）以构建字典。请参阅 dict 的文档。

What you have is a string, but dict function can only iterate over tuples (key-value pairs) to construct a dictionary. See the examples given in the dict's documentation.

在这种情况下，您可以使用 ast.literal_eval 将字符串转换为相应的 dict 对象，例如

In this particular case, you can use ast.literal_eval to convert the string to the corresponding dict object, like this

>>> p = "{'id':'12589456'}"
>>> from ast import literal_eval
>>> d = literal_eval(p)
>>> d['id']
'12589456'

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