如何将包含字典列表的字符串转换为列表

Question

我有下一个字符串:

"[
{ 
"name" : "name_1",
"codes" : ["some_code_1", "some_code_2"]
},

{
"name" : "name_2",
"codes" : ["some_code_1", "some_code_2"] 
}

]"

如何使这个字符串只是一个列表类型?

Answer 1

您可以使用内置的eval(不推荐)或"安全版本"进行评估。最后一个是ast.literal_eval，但是这两个都有问题。内置eval()存在安全问题，"安全";版本非常严格，以防止恶意代码。

我建议使用JSON library，它提供了一组使用json进行编码和解码的工具。

就这样做:

>> import json
>> to_decode = """
[
{ 
"name" : "name_1",
"codes" : ["some_code_1", "some_code_2"]
},

{
"name" : "name_2",
"codes" : ["some_code_1", "some_code_2"] 
}
]"""
>>> #to decode it here is the solution...
>>> json.JSONDecoder().decode(to_decode)
[
{ 
"name" : "name_1",
"codes" : ["some_code_1", "some_code_2"]
},

{
"name" : "name_2",
"codes" : ["some_code_1", "some_code_2"] 
}
]

或者您可以使用loads()函数代替:

>>> json.loads(to_decode)

Answer 2

尝试使用json库:

import json
sampleString = """
[
{ 
"name" : "name_1",
"codes" : ["some_code_1", "some_code_2"]
}, 
{
"name" : "name_2",
"codes" : ["some_code_1", "some_code_2"] 
}
]
"""
processedList = json.loads(sampleString)
print(processedList)