challenge_micro.py 文件源码

def _get_mapping(self):
        numbers = string.digits
        mapping = {x: random.choice(numbers) + '.' for x in numbers}

        def feedback_provider(is_correct, question):
            key = self.get_original_question(question)
            do_prepend = random.choice([True, False])
            if do_prepend:
                prepend = random.choice(numbers)
            else:
                prepend = ''
            return prepend + mapping[key]
        self.task_gen_kwargs['provide_feedback'] = feedback_provider
        return mapping


# stems from 5.7
# TODO: description says "either 3 or 4 or 5 chars. Shown example for 3
# chars". So will it be always the same size of feedback for on task
# instance? Or can it be mixed? - this version is mixed
# same question for 5.13, 5.14, 5.15, 5.16, 5.17 and 5.18