如何将带有字典的字符串转换为实际的字典对象？

Question

我有这样的字符串输出（它是来自 Popen 命令的字符串 return）：

p = Popen(ZOO_CMD, shell=True, stdin=PIPE, stdout=PIPE, stderr=PIPE)
output, err = p.communicate()
print output

变量 output 打印：

{
  "animals": [
    {
      "animalCount": 1
    }
  ],
  "zooName": "zoo1"
}

我试过这样加载字符串

json_dict = json.loads(output)
print json_dict['animals']

我得到这个回溯

Traceback (most recent call last):
  File "./zoo_dump", line 44, in <module>
    json_dict = json.loads(output)
  File "/usr/lib64/python2.6/json/__init__.py", line 307, in loads
    return _default_decoder.decode(s)
  File "/usr/lib64/python2.6/json/decoder.py", line 319, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib64/python2.6/json/decoder.py", line 338, in raw_decode
    raise ValueError("No JSON object could be decoded")
ValueError: No JSON object could be decoded

知道如何解决吗？

Answer 1

您尝试使其有效 JSON 然后进行解析，但这往往很容易出错，除非您有非常可预测的 json 错误。

相反，您可以使用 ast.literal_eval 安全地将其计算为 python:

import ast 

s = '''{
  "animals": [
    {
      "animalCount": 1,
    }
  ],
  "zooName": 'zoo1'
}'''

ast.literal_eval(s)

结果

{'animals': [{'animalCount': 1}], 'zooName': 'zoo1'}

如何将带有字典的字符串转换为实际的字典对象？

How to convert string with dict into actual dict object?

python

json

python-2.x