python logging模块书写日志以及日志分割详解

本文范例是书写两个日志：错误日志（ERROR级别）和运行日志（DEBUG级别），其中运行日志每日凌晨进行分割

import logging,datetime,logging.handlers
from conf import settings

if __name__ == "__main__":
 #两个日志，错误日志和运行日志，输出文件路径及文件名
 error_log = settings.ERROR_LOG_FILE
 run_log = settings.RUN_LOG_FILE

logger = logging.getLogger("mylog")
 logger.setLevel(logging.DEBUG)

DATE_FORMAT = "％Y-％m-％d ％H:％M:％S ％p"
 LOG_FORMAT = "％(asctime)s------％(levelname)s[:％(lineno)d]-------％(message)s"
 #第一种普通写法
 #file_run_log = logging.FileHandler(run_log)
 #假如需要每日凌晨进行日志切割,注意导入模块时需要导入logging.handlers,否则报错
 #when参数可以设置S M H D,分别是秒、分、小时、天分割，也可以按周几分割，也可以凌晨分割
 file_run_log = rf_handler = logging.handlers.TimedRotatingFileHandler(run_log, when='midnight', interval=1, backupCount=7, atTime=datetime.time(0, 0, 0, 0))

file_error_log = logging.FileHandler(error_log)

file_run_log.setLevel(level=logging.INFO)
 file_run_log.setFormatter(logging.Formatter(LOG_FORMAT))
 file_error_log.setLevel(level=logging.ERROR)
 file_error_log.setFormatter(logging.Formatter(LOG_FORMAT))

logger.addHandler(file_run_log)
 logger.addHandler(file_error_log)

logger.info("info test")
 logger.error("error test")
 logger.critical("critical test")

#普通全局写法
 # logging.basicConfig(level=logging.DEBUG,filename=run_log,format=LOG_FORMAT,datefmt=DATE_FORMAT)

# logging.info("this is a log")
 # logging.warning("this is warning")

settings.py:

ERROR_LOG_FILE = os.path.join(BASE_DIR,"log","error.log")
RUN_LOG_FILE = os.path.join(BASE_DIR,"log","run.log")

日志输出结果run.log:

来源：https://blog.csdn.net/java_raylu/article/details/85227064