I have found this:
import os import sys from cgi import parse_qs, escape def application (environ, start_response): d = parse_qs(environ['QUERY_STRING']) age = d.get('age', [''])[0] # Returns the first age value age = escape(age) hobbies = d.get('hobbies', []) # Returns a list of hobbies hobbies = [escape(hobby) for hobby in hobbies]