Python raw json string serialization

Question

i have a dictionary in python with one string variable like below (Of Course there are many other string fields there in the json, but only few are json escaped strings)

obj_dict = dict(details="{\"name\":\"Vyshakh\",\"martial_status\" : \"Single\"}")

how can I convert such an object to normal json as below:

{
   details : {
       name : "Vyshakh",
       martial_status : "Single"
   }
}

In Java using Jackson I can annotate a field using @JsonRawValue, what is the best way in Python to achieve the same

Thomas · Accepted Answer · 2022-09-14 07:48:24Z

2

Override the encoder to return the raw json string.

import json

class RawJSON(str): pass

origEnc = json.encoder.encode_basestring_ascii
def rawEnc(obj):
  if isinstance(obj, RawJSON):
    return obj
  return origEnc(obj)
json.encoder.encode_basestring_ascii = rawEnc

obj_dict = dict(details=RawJSON("{\"name\":\"Vyshakh\",\"martial_status\" : \"Single\"}"))
print(json.dumps(obj_dict)) # {"details": {"name":"Vyshakh","martial_status" : "Single"}}

edited Sep 14, 2022 at 7:48

Thomas

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answered Feb 26, 2018 at 9:51

Zectbumo

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Comments

Vasili Syrakis · Accepted Answer · 2017-03-02 07:54:39Z

0

The json module from the standard library has json.loads() for this.

You pass the JSON-compatible string to json.loads() and it will return a dictionary object.

From the Python interpreter:

>>> import json
>>> help(json.loads)
Help on function loads in module json:

loads(s, encoding=None, cls=None, object_hook=None, parse_float=None, parse_int=None, parse_constant=None, object_pairs_hook=None, **kw)
    Deserialize ``s`` (a ``str`` instance containing a JSON
    document) to a Python object.

answered Mar 2, 2017 at 7:54

Vasili Syrakis

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1 Comment

Ysak Over a year ago

I know i can use json.loads(), but wich parse through the entire string and create a dictionary out of it. But in reality , there is no use for the data for the resource owner, only for external systems this data is relevant. I worry why i should convert this string to another dictionary object, and this object is very heavy in size can go up to 128KB of string data. is there a way that while serialization, just consider this as a raw Json formated string. that is what @JsonRawValue does in Java (Jackson)..Looking for any alternative like that in python

L Tyrone · Accepted Answer · 2024-08-17 04:29:19Z

0

In Python, I had success making a method like this:

def db_format_json(value: json):
    return json.dumps(json.loads(value))

The loads removes the slashes while making it a Python dict, then the dumps puts it back into json without slashes.

edited Aug 17, 2024 at 4:29

L Tyrone

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answered Aug 15, 2024 at 17:58

VaporProBuild

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