How to use the africastalking.Service.AfricasTalkingException function in africastalking

def cb(response):
                if 200 <= response.status_code < 300:
                    if response.headers.get('content-type') == 'application/json':
                        callback(None, response.json())
                    else:
                        callback(None, response.text)
                else:
                    callback(AfricasTalkingException(response.text), None)

else:
            def cb(response):
                if 200 <= response.status_code < 300:
                    if response.headers.get('content-type') == 'application/json':
                        callback(None, response.json())
                    else:
                        callback(None, response.text)
                else:
                    callback(AfricasTalkingException(response.text), None)

            if method == 'GET':
                _target = self.__make_get_request
            elif method == 'POST':
                _target = self.__make_post_request
            else:
                raise AfricasTalkingException('Unexpected HTTP method: ' + method)

            thread = threading.Thread(target=_target, args=(url, headers, data, params, cb))
            thread.start()
            return thread

if callback is None:

            if method == 'GET':
                res = self.__make_get_request(url=url, headers=headers, data=data, params=params)
            elif method == 'POST':
                res = self.__make_post_request(url=url, headers=headers, data=data, params=params)
            else:
                raise AfricasTalkingException('Unexpected HTTP method: ' + method)

            if 200 <= res.status_code < 300:
                if res.headers.get('content-type') == 'application/json':
                    return res.json()
                else:
                    return res.text
            else:
                raise AfricasTalkingException(res.text)
        elif not callable(callback):
            raise RuntimeError('callback has to be callable. e.g. a function')
        else:
            def cb(response):
                if 200 <= response.status_code < 300:
                    if response.headers.get('content-type') == 'application/json':
                        callback(None, response.json())
                    else:
                        callback(None, response.text)
                else:
                    callback(AfricasTalkingException(response.text), None)

            if method == 'GET':
                _target = self.__make_get_request
            elif method == 'POST':
                _target = self.__make_post_request