Django中间件记录Request ID时抛出异常的问题求助

各位好，我写了一段用来给请求添加Request ID并记录日志的Django中间件代码，但运行时总是抛出异常，实在找不到问题所在，麻烦大家帮我排查一下！

下面是我的代码：

request_id_middleware.py #

import uuid

from django.middleware.common import CommonMiddleware
from taiji.logger import logger

class RequestIDMiddleware(CommonMiddleware):
    def process_request(self, request):
        request.META['request_id'] = str(uuid.uuid4())
        logger.info(f"start request id: {request.META['request_id']}")
        return request

    def process_response(self, request, response):
        if request.META.get('request_id') is None:
            response.headers['X-REQUEST-ID'] = request.META['request_id']
            logger.info(f"finish request id: {response.headers['X-REQUEST-ID']}")
        return response

logger.py #

import logging


def set_logger(name):
    logger=logging.getLogger(name)
    handler=logging.StreamHandler()
    handler.setLevel(logging.DEBUG)
    fmt=logging.Format...

目前代码运行时会抛出异常，我暂时还没定位到具体是哪一行导致的，有没有大佬能看出问题？

备注：内容来源于stack exchange，提问作者Cherrymelon