python logging模块使用 【代码可直接复制使用】【按照日期存储自动生成文件】【同时输出到控制台和文件中】_python log日志如何按日期自动创建

说明

• 利用logging模块做了一个类和一个装饰器，可以将代码直接拷贝到自己的工程中使用，测试代码和说明下面也都有。
• 日志会自动生成文件并且按照日期存储
• 日志会同时输出到控制台和文件中
• 使用时可以看使用示例

参数说明：
backupCount=3 ：保存3天的日志
when=“MIDNIGHT” ： 每天晚上零点会保存一个新的日志

日志文件代码

#!/usr/bin/env python3
# -*- encoding: utf-8 -*-
'''
@File    :   mt_log.py
@Time    :   2022/09/26 21:12:03
@Author  :   YuanPangZi 
@Version :   1.0
@Contact :   https://blog.csdn.net/qq_36389249?spm=1000.2115.3001.5343
@License :   bf24ebed572b07451d0342fc762710a6
@Desc    :   572b07451d0342fc
'''

# here put the import lib


import logging
from logging import handlers
import os 
import time


#日志的设置
class Logger(object):
    level_relations = {
        "debug": logging.DEBUG,
        "info": logging.INFO,
        "warning": logging.WARNING,
        "error": logging.ERROR,
        "critical": logging.CRITICAL
    }
 
    def __init__(self, filename="MtTer.log", level="info", when="D", backupCount=3, fmt="%(asctime)s - %(pathname)s[line:%(lineno)d] - %"
                                                                                              "(levelname)s: %(message)s"):
        format_str = logging.Formatter(fmt)
        streamHandler = logging.StreamHandler()
        streamHandler.setFormatter(format_str)
        log_dir=os.path.join(os.path.dirname(os.path.dirname(__file__)),"Mtlogs")
        today = time.strftime('%Y%m%d', time.localtime(time.time()))
        full_path=os.path.join(log_dir,today)
        if not os.path.exists(full_path):
            os.makedirs(full_path)
        log_path=os.path.join(full_path,filename)
        fileHandler = handlers.TimedRotatingFileHandler(filename=log_path, when=when, backupCount=backupCount, encoding="utf-8")
        fileHandler.setFormatter(format_str)
        self.logger = logging.getLogger(log_path)
        self.logger.setLevel(self.level_relations.get(level))
        self.logger.addHandler(streamHandler)
        self.logger.addHandler(fileHandler)

log = Logger(level="info", when="MIDNIGHT").logger



def Mtlog(func):
    logger = logging.getLogger(__name__)
    logger.setLevel('DEBUG')
    formatter = logging.Formatter( "%(asctime)s - %(pathname)s[line:%(lineno)d] - %(levelname)s: %(message)s")
    ch = logging.StreamHandler()
    ch.setFormatter(formatter)
    logger.addHandler(ch)
    log_dir=os.path.join(os.path.dirname(os.path.dirname(__file__)),"Mtlogs")
    today = time.strftime('%Y%m%d', time.localtime(time.time()))
    full_path=os.path.join(log_dir,today)
    if not os.path.exists(full_path):
        os.makedirs(full_path)
    log_path=os.path.join(full_path,"MtTer.log")
    file_handler = logging.FileHandler(log_path,encoding="utf8")
    file_handler.setFormatter(formatter)
    logger.addHandler(file_handler)
    
    def inner(*args, **kwargs):

        try:
            res = func(*args, **kwargs)
            logger.debug(f"func: {func.__name__} {args} - > {res}")
            return res
        except Exception as e:
            res = func(*args, **kwargs)
            logger.error(f"func: {func.__name__} {args} - > {res}")
            return res
        
    return inner
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'
运行
运行

测试用例

'''
@File    :   main.py
@Time    :   2022/10/11 15:25:28
@Author  :   YuanPangZi 
@Version :   1.0
@Contact :   https://blog.csdn.net/qq_36389249?spm=1000.2115.3001.5343
@License :   bf24ebed572b07451d0342fc762710a6
@Desc    :   572b07451d0342fc
'''

# here put the import lib


from mt_log import *


@Mtlog
def test(a, b):
    print(a, b)
    log.info("test!!!")
    return a,b

if __name__ == "__main__":
    test(1, 2)

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运行结果