Python json解析错误处理

在处理Json字符串时，当在Json原始数据中出现某些空格时，可能会出现 json.decoder.JSONDecodeError 的错误。

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import json

error_json = '{"name": "Tom\0"}'
json_result = json.loads(error_json)

# output
Traceback (most recent call last):
  File "/home/xxxxxx/PycharmProjects/Python/Json/JsonParserError.py", line 9, in <module>
    json_result = json.loads(error_json)
  File "/usr/lib/python3.6/json/__init__.py", line 354, in loads
    return _default_decoder.decode(s)
  File "/usr/lib/python3.6/json/decoder.py", line 339, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib/python3.6/json/decoder.py", line 355, in raw_decode
    obj, end = self.scan_once(s, idx)
json.decoder.JSONDecodeError: Invalid control character at: line 1 column 14 (char 13)

这是由于默认情况下，json 模块使用的是严格匹配，即参数 strict默认为True。

If strict is false (true is the default), then control characters will be allowed inside strings. Control characters in this context are those with character codes in the 0-31 range, including '\\t' (tab), '\\n', '\\r' and '\\0'.

在上面的代码中，出现的json中包含了空格，导致了解析出错，只需要将 strict=Fasle 加上就行。

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import json

error_json = '{"name": "Tom\0"}'
# json_result = json.loads(error_json)
json_result = json.loads(error_json, strict = False)

# output
Process finished with exit code 0

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