This code snippet shows how to handle json with python

Json.py

# pip install simplejson

import simplejson as json   # Importing simplejson with a different name for ease of use
import os
if os.path.isfile("./ages.json") and os.stat("./ages.json").st_size !=0: # Checking if a file exists and size is not zero
    old_file = open("./ages.json", "r+")
    data = json.loads(old_file.read())
    print("Current age is:", data["age"])
    data["age"] = data["age"]+1
else:
    old_file = open("./ages.json", "w+")  # If file does not exist then we create one and dump some data into it
    data = {"name": "ansh", "age": 23}

old_file.seek(0) # seeking to starting position of file
old_file.write(json.dumps(data)) # Writing data to file