GeoLocation of an IP Address using PHP & Python

geolocation-ip-address.php

<?php
    //Tutorial : http://www.idiotinside.com/2015/02/05/find-geolocation-of-an-ip-address-using-php-and-python/
    
    $ipAddress = "IP_ADDRESS";
    $ip_key = "YOUR_API_KEY";

    $query = "http://api.ipinfodb.com/v3/ip-city/?key=" . $ip_key . "&ip=" . $ipAddress . "&format=json";
    $json = file_get_contents($query);
    $data = json_decode($json, true);

    if ($data['statusCode'] == "OK") {
        echo '<pre>';
        echo "IP Address: " . $ipAddress;
        echo "Country: " . $data['countryName'];
        echo "Region: " . $data['regionName'];
        echo "City: " . $data['cityName'];
        echo "Latitude: " . $data['latitude'];
        echo "Longitude: " . $data['longitude'];
        echo '</pre>';
    } else {
        echo $data['statusCode']." ".$data['statusMessage'];
    }

?>

geolocation-ip-address.py

#Tutorial : http://www.idiotinside.com/2015/02/05/find-geolocation-of-an-ip-address-using-php-and-python/

import urllib2
import json

def getIPAddress(api_key,ip_address):
	api_endpoint = "http://api.ipinfodb.com/v3/ip-city/?key=" +api_key+"&ip="+ip_address+"&format=json"
	try:
		api_response = urllib2.urlopen(api_endpoint)
		try:
			return json.loads(api_response.read())
		except (ValueError, KeyError, TypeError):
			return "JSON format error"
	
	except IOError, e:
		if hasattr(e, 'code'):
			return e.code
		elif hasattr(e, 'reason'):
			return e.reason

api_key = "YOUR_API_KEY" 
ip_address = "IP_ADDRESS"

data = getIPAddress(api_key,ip_address)
#print data
if data['statusCode'] == "OK":
	print "IP: "+ ip_address
	print "API Status:"+ data['statusCode']
	print "Country:"+ data['countryName']
	print "Region:"+ data['regionName']
	print "City:"+ data['cityName']
	print "Latitude:"+ data['latitude']
	print "Longitude:"+ data['longitude']
else:
	print data['statusCode']
	print data['statusMessage']
	

how can i get the api key?

I am getting an error in the line 15.. Don't know why :(

how can i get api key