logging模块日志重复打印问题

小问题解析

  今天练习中间件时 出现的小问题，分享一下，代码简陋，凑合看吧

　　longgin 打印时 第一次打印一次日志 第二次打印两次日志，逐次递增 

from django.utils.deprecation import MiddlewareMixin
import logging
lis =[]

class Middlel(MiddlewareMixin):

    def process_request(self,request):
        lis.append(request.META)
        for i in lis:
            log = i['HTTP_USER_AGENT']

        logger = logging.getLogger()
        logger.setLevel(logging.INFO)
        fh = logging.FileHandler("1.log")
        fh.setLevel(logging.DEBUG)


        formatter = logging.Formatter("%(asctime)s - %(filename)s[line:%(lineno)d] "
                                      "- %(levelname)s: %(message)s")
        fh.setFormatter(formatter)
        logger.addHandler(fh)
        logger.critical(log)

更改后的代码 

from django.utils.deprecation import MiddlewareMixin
import logging
lis =[]
logger = logging.getLogger()
logger.setLevel(logging.INFO)
fh = logging.FileHandler("1.log")
fh.setLevel(logging.DEBUG)
class Middlel(MiddlewareMixin):

    def process_request(self,request):
        lis.append(request.META)
        for i in lis:
            log = i['HTTP_USER_AGENT']


        formatter = logging.Formatter("%(asctime)s - %(filename)s[line:%(lineno)d] "
                                      "- %(levelname)s: %(message)s")
        fh.setFormatter(formatter)
        logger.addHandler(fh)
        logger.critical(log)

将 实例化个对象 设定对象等级  写入那个文件  写入文件时触发的等级 四句话 挪到类上边就行。