jsonfilegen.py

import json
import random

dic = dict()
file = open("test.json", mode="w")

i = 0
while i < 5000000:
    dic[i] = {
        "int": 123456 + i + random.randrange(100000, 2 ** 30),
        "double": (654321 - i + random.randrange(500, 2 ** 24)) / random.randrange(11, 99, step=2),
        "boolean": bool(random.randint(0, 1))
    }
    i += 1

json.dump(dic, file)

file.close()