is there any way to validate the function parameters correctly and easily? Say we have a function where parameter is required, Python just sends a Type or ValueError when the parameter is used, but I want to validate it first and then send an error. But this way what I am currently using, it is not recommend useful and readable. Can someone show me a nice, cool and better way? I don't want to check it one by one. def test_function(user_id, name, response, model): if not user_id or not name or not response or not model: raise ValueError("user_id, name, response and model must be not None.") Continue reading...