TypeError: unbound method decode() must be called with JSONDecoder instance as first

[Jagdeep]

TypeError: unbound method decode() must be called with JSONDecoder instance as first argument (got PrintJson instance instead)

I am getting this error when I try to parse python object into json.

Using following code:-

import json
from json import JSONDecoder
 
class TestJson():
    name = None
    pass
 
printJson = PrintJson()
print printJson
print JSONDecoder.decode(printJson) // at this line, getting this error

[Jagdeep]

I tried. This statement JSONDecoder().decode(printJson). But It's not working.

[dwblas]

TypeError: unbound method decode() must be called with JSONDecoder instance

Don't know anything about this package but the error message says you use an instance of JSONDecoder, something like

JD=JSONDecoder()  ## creates class instance
print JD.decode(printJson)

[Jagdeep]

Thanks for reply,

I tried but it's not working. Facing below mentioned error, after using with instance "JD".
ERROR:-

File "C:\Users\jagdeep\test\json_test.py", line 70, in <module>
<json_test.PrintJson object at 0x000000000262AF28>    print jsd.decode(printJson)
Now try to use json decode
  File "C:\Python27\lib\json\decoder.py", line 366, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
TypeError: expected string or buffer

[dwblas]

The error is obvious. It requires a string so do a "print type(printJson)" before the error line and if it is a type that can be converted to a string, you can pass str(printJson) to the function.

[Jagdeep]

import json
from json import JSONDecoder
from json import JSONEncoder
 
class PrintJSON(object):
    name = None
    pass
printJson = PrintJSON()
printJson.name = "This is test"
 
 
jd = JSONDecoder()
print(jd.decode(str(printJson)))
 
But getting error:-
Traceback (most recent call last):
  File "C:/Users/jagdeep/test/json_test2.py", line 15, in <module>
    print(jd.decode(str(printJson)))
  File "C:\Python27\lib\json\decoder.py", line 366, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "C:\Python27\lib\json\decoder.py", line 384, in raw_decode
    raise ValueError("No JSON object could be decoded")
ValueError: No JSON object could be decoded