How to restrict user access from a specific region based on their IP address?

To restrict user access from a specific region by IP address in Python, geolocation databases such as MaxMind GeoIP2 are commonly used. The idea is to determine the country or region based on the IP, and if it is on a blocked list, access is denied.

An example using the geoip2 library:

import geoip2.database

reader = geoip2.database.Reader('/path/to/GeoLite2-City.mmdb')

ip = '8.8.8.8'
try:
    response = reader.city(ip)
    country = response.country.iso_code
    if country == 'RU':  # for example, block Russia
        print('Access denied')
    else:
        print('Access granted')
except geoip2.errors.AddressNotFoundError:
    print('IP not found in database')

reader.close()

For web applications, this code can be integrated into middleware or filters that check the IP of each request and block unwanted regions. Ready-made services or CDNs with geoblocking can also be used.