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pkpy has two JSON modules.
import json.v1.2.7, you can set PK_USE_CJSON to ON in CMakeLists.txt to enable an alternative JSON module cjson.Their interfaces are the same. cjson is faster while the built-in json is more stable since it was developed earlier.
json.loads(data: str | bytes)Decode a JSON string into a python object.
json.dumps(obj) -> strEncode a python object into a JSON string.