human
I wrote the below code

    def decorator(func):
        @wraps(func)
        def wrapper(self, *args, **kwargs):
            if (method == 'GET'):
                params = self.get_params
            elif (method == 'POST'):
                params = self.post_dict
            else:
                raise ValueError("Unsupported    method    '{method}'".format(method=method))
            missing = []
            for key in required_keys:
                if (params.get(key) is None):
                    missing.append(key)
            if (len(missing) > 0):
                msg = 'Missing    required    key(s)    {keys}'.format(keys=','.join(missing))
                self.send_response(400, content=msg, headers={'Content-type': 'text/plain'})
            else:
                return func(self, *args, **kwargs)
        return wrapper
    return decorator

What's a good function header?

=====
Here's a good function header?
assistant
#Here's a good function header.

def require_params(method, *required_keys):