Json With Python

Question

Tried a program -if json file already exists do nothing and if it does not exist then ask for input and write that input to file.Error is coming when I give input

import json
name="first.json"
try:
 r=open(name)
except FileNotFoundError:
 e=open(name,"w")
 a=input("Enter Name: ")
 json.dump(e,a)

• ForceBru: "Error is coming" - what's the error?
• mudit jain: Enter Name: a r=open(name) FileNotFoundError: [Errno 2] No such file or directory: 'first.json'
• user3431635: in function "json.dump(e,a)" first parameter is object to dump and second one is file object
• mudit jain: Also,During handling of the above exception, another exception occurred: Traceback line 10, in <module> json.dump(e,a) File "C:.....\Python\Python39\lib\json_init_.py", line 179, in dump for chunk in iterable: File "C:......\Python\Python39\lib\json\encoder.py", line 438, in iterencode o = _default(o) File "C:\....Python39\lib\json\encoder.py", line 179, in default raise TypeError(f'Object of type {o.__class_.__name__} ' TypeError: Object of type TextIOWrapper is not JSON serializable
• mudit jain: @user3431635 That was a very silly mistake of mine.Thanks.

Answer 1

import json
name="test.json"
try:
 r=open(name)
except FileNotFoundError:
 with open(name,"w") as e:
 a=input("Enter Name: ")
 json.dump(a,e)

Answer 2

json.dump takes data to be written into a file first and the file second.

So the code should be:

# json.dump(data, file)
json.dump(a,e)

https://docs.python.org/3/library/json.html#json.dump

Answer 3

Probably your problem is wrong input data. Script has not any error. input {"1": 1} is worked