Code to generate position of cities randomly for Traveling Salesman Problem

random_cities.py

import json
import random

cities = []
nnmax = 50

for nn in range(nnmax):
  city = {}
  city['id'] = nn
  city['x'] = (random.random() - 0.5)*2
  city['y'] = (random.random() - 0.5)*2
  cities.append(city)

with open('city_info.json', "w") as file:
  json.dump(cities, file, sort_keys=True, indent=2)