logging

utils/log.py

import logging
import os
# 1. 创建一个logger
logger = logging.getLogger('simple_example')
logger.setLevel(logging.DEBUG)  # Log等级总开关
# 2.控制台的handler
ch = logging.StreamHandler()
ch.setLevel(logging.DEBUG)
# 3. 写入文件的handler
root_dir = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
fh = logging.FileHandler(filename=os.path.join(root_dir, 'log/run.log'), encoding='utf-8')
# 4. 定义handler的输出格式
format ='%(asctime)s - %(filename)s - %(lineno)d - %(name)s - %(levelname)s - %(message)s'
formatter = logging.Formatter(fmt=format)
ch.setFormatter(formatter)
fh.setFormatter(formatter)
# 将logger添加到handler里面
logger.addHandler(ch)
logger.addHandler(fh)

调用：

import pymysql
from utils.log import logger
logger.error('数据库连接失败')

loguru

utils/Loggings.py

import os
from loguru import logger
class Loggings:
    root_dir = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
    filename = os.path.join(root_dir, 'log/run.log')
    __instance = None
    logger.add(
        sink=filename,  # 写入文件路径
        rotation="500MB",
        encoding="utf-8",
        enqueue=True,
        retention="10 days"
    )
    def __new__(cls, *args, **kwargs):
        if not cls.__instance:
            cls.__instance = super(Loggings, cls).__new__(cls, *args, **kwargs)
        return cls.__instance
    def info(self, msg):
        return logger.info(msg)
    def debug(self, msg):
        return logger.debug(msg)
    def warning(self, msg):
        return logger.warning(msg)
    def error(self, msg):
        return logger.error(msg)

调用：

from utils.Loggings import Loggings
log = Loggings()
log.info('this is a info')