python - 使用 json.loads()/Python 时忽略引号中的逗号？

Question

这个问题已经有答案了:

Why does json.loads() work on some strings? [duplicate] (2 个回答)

Single vs double quotes in JSON (12 个回答)

已关闭 4 年前。

当前使用以下命令:

python foo.py "['A,B,C,D','A,B,C','A,B','A']"

我想将其转换为实际的字符串数组:

A[0] = 'A,B,C,D'
A[1] = 'A,B,C' 
A[2] = 'A,B' 
A[3] = 'A' 

目前，我一直在尝试使用json.loads()和sys将字符串读入对象或列表。

但是，单引号的存在似乎会导致以下错误。

ValueError: No JSON object could be decoded

但是，如果没有单引号，我最终会得到数组:

B = ["A","B","C","D","A","B","C","A","B","A"]

如何让 Python 忽略内部逗号，同时跟踪外部逗号，以便生成 A 中给出的字符串数组如上所示？

Answer 1

您可以使用ast.literal_eval到...

Safely evaluate an expression node or a string containing a Python expression. The string or node provided may only consist of the following Python literal structures: strings, bytes, numbers, tuples, lists, dicts, sets, booleans, and None.

>>> from ast import literal_eval
>>> literal_eval("['A,B,C,D','A,B,C','A,B','A']")
['A,B,C,D', 'A,B,C', 'A,B', 'A']