Python用转义的双引号解析JSON

Question

考虑这个有效的json：

{"a": 1, "b": "{\"c\":2}"}

json当我尝试解析它时，Python 的模块抛出 - 看起来\"它正在抛出它：

json.loads('{"a": 1, "b": "{\"c\":2}"}')
回溯（最近一次调用最后一次）：
  文件“”，第 1 行，在 
  文件“/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/__init__.py”，第 338 行，加载中
    返回 _default_decoder.decode(s)
  文件“/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/decoder.py”，第 365 行，解码
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  文件“/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/decoder.py”，第 381 行，raw_decode
    obj, end = self.scan_once(s, idx)
ValueError: Expecting , delimiter: line 1 column 15 (char 14)

有没有办法在 Python 中解析这个，要么使用json模块，要么使用其他模块，比如ujson？

Answer 1

实际上，转义双引号并不重要。看我的测试：

>>> json.loads('{"a": 1, "b": "{\"c\":2}"}')
Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "/usr/lib/python3.4/json/__init__.py", line 318, in loads
    return _default_decoder.decode(s)
  File "/usr/lib/python3.4/json/decoder.py", line 343, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib/python3.4/json/decoder.py", line 359, in raw_decode
    obj, end = self.scan_once(s, idx)
ValueError: Expecting ',' delimiter: line 1 column 18 (char 17)

>>> json.loads('{"a": 1, "b": "{"c":2}"}')
Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "/usr/lib/python3.4/json/__init__.py", line 318, in loads
    return _default_decoder.decode(s)
  File "/usr/lib/python3.4/json/decoder.py", line 343, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib/python3.4/json/decoder.py", line 359, in raw_decode
    obj, end = self.scan_once(s, idx)
ValueError: Expecting ',' delimiter: line 1 column 18 (char 17)

>>> json.loads('{"a": 1, "b": {"c":2}}')
{'a': 1, 'b': {'c': 2}}

>>> json.loads('{"a": 1, "b": {\"c\":2}}')
{'a': 1, 'b': {'c': 2}}

>>>