import time
import random

def cache(timeout):
    def wrap1(fn):
        last_access = None
        cached_result = None
        def wrap2():
            nonlocal last_access, cached_result

            now = time.time()
            if not last_access or abs(last_access - now) > timeout:
                cached_result = fn()
                last_access = now
            return cached_result
        return wrap2
    return wrap1

@cache(0.5)
def param1():
    return random.randint(0, 100000)

@cache(2)
def param2():
    return hex(random.randint(0, 10**10))

@cache(5)
def param3():
    return [random.randint(0, 255) for _ in range(10)]

def application(environ, start_response):
    start_response('200 OK', [('Content-Type', 'text/plain')])

    out = []
    out.append('param1: ' + str(param1()))
    out.append('param2: ' + str(param2()))
    out.append('param3: ' + str(param3()))

    return ["\n".join(out).encode()]

if __name__ == '__main__':
    from wsgiref.simple_server import make_server
    make_server('', 80, application).serve_forever()