POST request : Error 500 Internal Server Error about air-quality-web HOT 7 CLOSED

import json
from urllib import request, parse

api_url = "http://sensors.connectedhumber.org/beta/api.php?action="

no_of_locations = 3
my_location = ( 53.750, -0.395 )

def get_nearest_sensors( my_location, no_of_locations ):
    url = str( api_url ) + "list-devices-near&count=" + str( no_of_locations )
    data = parse.urlencode( {'latitude': my_location[0], 'longitude': my_location[1]} ).encode()
    req = request.Request( url, data=data )
    response = request.urlopen( req )
    return response

# ------- #
nearest_sensors = json.loads( get_nearest_sensors( my_location, no_of_locations ).read().decode('utf-8') )
print( nearest_sensors )
    
for line in nearest_sensors:
    print( line['id'], line['name'], "is", round( line['distance_actual']*0.000621, 1), "miles away" )
print("----------")

[{'id': 36, 'name': 'CHASW-24AD43-1', 'latitude': 53.75642593, 'longitude': -0.36844245, 'distance_calc': 1886.588853560329, 'last_seen': '2020-03-08 21:32:06', 'distance_actual': 1892.19}, {'id': 36, 'name': 'CHASW-24AD43-1', 'latitude': 53.75642593, 'longitude': -0.36844245, 'distance_calc': 1886.588853560329, 'last_seen': '2020-03-08 21:32:06', 'distance_actual': 1892.19}, {'id': 36, 'name': 'CHASW-24AD43-1', 'latitude': 53.75642593, 'longitude': -0.36844245, 'distance_calc': 1886.588853560329, 'last_seen': '2020-03-08 21:32:06', 'distance_actual': 1892.19}]
36 CHASW-24AD43-1 is 1.2 miles away
36 CHASW-24AD43-1 is 1.2 miles away
36 CHASW-24AD43-1 is 1.2 miles away