Python:通用日志

1.主要代码

import logging
from logging.handlers import RotatingFileHandler
from pathlib import Path
LOG_DIR=Path("logs")
LOG_DIR.mkdir(exist_ok=True)
def get_logger(name:str) -> logging.Logger:logger=logging.getLogger(name)if logger.handlers:return loggerlogger.setLevel(logging.DEBUG)formatter=logging.Formatter("%(asctime)s|%(name)s|%(levelname)s|%(message)s")#1 控制台console_handler=logging.StreamHandler()console_handler.setLevel(logging.INFO)console_handler.setFormatter(formatter)#2 普通日志文件app_file_handler=RotatingFileHandler(LOG_DIR / "app.log",maxBytes=1_000_000,backupCount=5,encoding="utf-8")app_file_handler.setLevel(logging.INFO)app_file_handler.setFormatter(formatter)#3 错我日志文件error_file_handler=RotatingFileHandler(LOG_DIR/"error.log",maxBytes=1_000_000,backupCount=5,encoding="utf-8")error_file_handler.setLevel(logging.ERROR)error_file_handler.setFormatter(formatter)logger.addHandler(console_handler)logger.addHandler(app_file_handler)logger.addHandler(error_file_handler)return logger

2.调用

from logger_config import get_logger
logger=get_logger(__name__)
logger.info("Programe started")
logger.error("Something went wrong")

3.结果
console中输出了：
2026-03-06 18:03:47,754|main|INFO|Programe started
2026-03-06 18:03:47,755|main|ERROR|Something went wrong
app.log中输出了：
2026-03-06 18:03:47,754|main|INFO|Programe started
2026-03-06 18:03:47,755|main|ERROR|Something went wrong
error.log中输入了：
2026-03-06 18:03:47,755|main|ERROR|Something went wrong