How to use the py4web.response function in py4web

def test_session(self):
        request.app_name = "myapp"
        session = Session(secret="a", expiration=10)
        session.on_request()
        session["key"] = "value"
        session.on_success()
        cookie_name = session.local.session_cookie_name

        a, b = str(response._cookies)[len("Set-Cookie: ") :].split(";")[0].split("=", 1)
        request.cookies[a] = b
        request.cookies = response._cookies
        session.local.data.clear()

        session = Session(secret="b", expiration=10)
        session.on_request()
        self.assertEqual(session.get("key"), None)

        session = Session(secret="a", expiration=10)
        session.on_request()
        self.assertEqual(session.get("key"), "value")

def test_session(self):
        request.app_name = "myapp"
        session = Session(secret="a", expiration=10)
        session.on_request()
        session["key"] = "value"
        session.on_success()
        cookie_name = session.local.session_cookie_name

        a, b = str(response._cookies)[len("Set-Cookie: ") :].split(";")[0].split("=", 1)
        request.cookies[a] = b
        request.cookies = response._cookies
        session.local.data.clear()

        session = Session(secret="b", expiration=10)
        session.on_request()
        self.assertEqual(session.get("key"), None)

        session = Session(secret="a", expiration=10)
        session.on_request()
        self.assertEqual(session.get("key"), "value")

app_dir = os.path.join(FOLDER, appname)
        store = io.BytesIO()
        zip = zipfile.ZipFile(store, mode="w")
        for root, dirs, files in os.walk(app_dir, topdown=False):
            if not root.startswith("."):
                for name in files:
                    if not (
                        name.endswith("~") or name.endswith(".pyc") or name[:1] in "#."
                    ):
                        filename = os.path.join(root, name)
                        short = filename[len(app_dir + os.path.sep) :]
                        print("added", filename, short)
                        zip.write(filename, short)
        zip.close()
        data = store.getvalue()
        response.headers["Content-Type"] = "application/zip"
        return data

def api(self, tablename, id=None):
        policy = self.policy
        data = self.restapi(request.method, tablename, id, request.query, request.json)
        response.status = data["code"]
        return data

"databases": [
                    {"name": name, "tables": tables(name)} for name in databases
                ]
            }
        elif len(args) > 2 and args[1] in databases:
            db = getattr(module, args[1])
            id = args[3] if len(args) == 4 else None
            data = action.uses(db, T)(
                lambda: RestAPI(db, policy)(
                    request.method, args[2], id, request.query, request.json
                )
            )()
        else:
            data = {}
        if "code" in data:
            response.status = data["code"]
        return data