Template function pattern

marty.py

#!/usr/bin/env python
# See http://stackoverflow.com/questions/32885753/

class BaseRequestProcessor(object):
    # Template class.
    # The request processor gets some query, parses it into a request, executes it
    # then saves the result and writes some logging info.
    def get_query(self):
        raise NotImplementedError()

    def make_request(self, query):
        raise NotImplementedError()

    def make_api_call(self, request):
        raise NotImplementedError()

    def process_response(self, response):
        raise NotImplementedError()

    def populate_database(self, details):
        raise NotImplementedError()

    def log_status(self, status):
        pass

    def __call__(self):
        try:
            query = self.get_query()
            request = self.make_request(query)
            response = self.make_api_call(request)
            details = self.process_response(response)
            status = self.populate_database(details)
        except Exception:
            import traceback
            status = 'Error, traceback follows:\n' + traceback.format_exc()
        self.log_status(status)



class ConsoleRequest(BaseRequestProcessor):
    # Implements handling request directly from the console
    def get_query(self):
        return input('Your query: ')

    def populate_database(self, details):
        print(details)
        return 'Success, I could populate user\'s brain'

    def log_status(self, status):
        print(status)


class StringQuery(BaseRequestProcessor):
    # Converts request to a list of string / response to a string
    def make_request(self, query):
        return query.split(' ')

    def process_response(self, response):
        return 'The result was: {}'.format(response)


class MultiplierProcessor(BaseRequestProcessor):
    # Given a list of arguments, multiply them
    def make_api_call(self, request):
        result = 1
        for argument in request:
            result *= int(argument)
        return result


class MyDemoProcessor(ConsoleRequest, StringQuery, MultiplierProcessor, BaseRequestProcessor):
    pass


if __name__ == '__main__':
    processor = MyDemoProcessor()
    while True:
        processor()