def test_avg_city(self):
n = Network()
json_file = 'C:\Users\ShravanB\Documents\College\CS242\CSAir\data\CSAir.json'
f = open(json_file, 'r')
data = json.loads(f.read())
n.create_metros(data['metros'])
n.create_routes(data['routes'])
avg_city = "Average City Population: 11796143"
self.assertEqual(n.get_average_size(), avg_city)
