adding element to json

test.py

import json

# a Python object (dict):
x = [{
  "name": "John",
  "age": 30,
  "city": "New York"
},
{
  "name": "sandeep",
  "age": 30,
  "city": "Walnut Creek"
}]


x.insert(0,{"averageAge":30, "firstCity ": "newYork"})

# convert into JSON:
y = json.dumps(x)

# the result is a JSON string:
print(y)