系统:Windows 10 编辑器:JetBrains PyCharm Community Edition 2018.2.2 x64
Part 1:场景描述
Part 2:代码
import os
import logging
def write_log(level, msg):
log_file = os.path.join(os.getcwd(), 'logINFO.txt')
logging.basicConfig(
# 定义输出到文件的log级别,大于此级别的都被输出
level=logging.INFO,
# 定义输出log的格式
format='日志生成时间:%(asctime)s 执行文件名:%(filename)s[line:%(lineno)d] 级别:%(levelname)s 输出信息:%(message)s',
datefmt='%Y-%m-%d %A %H:%M:%S', # 时间
filename=log_file, # log文件名
filemode='a+') # 写入模式“w”或“a”
if level == "debug":
logging.debug(msg)
elif level == "info":
logging.info(msg)
elif level == "warning":
logging.warning(msg)
elif level == "error":
logging.error(msg)
elif level == "critical":
logging.critical(msg)
else:
logging.info(msg)
msg = "log1"
level = "debug"
write_log(level, msg)
msg = "log2"
level = "info"
write_log(level, msg)
msg = "log3"
level = "warning"
write_log(level, msg)
msg = "log4"
level = "error"
write_log(level, msg)
msg = "log5"
level = "critical"
write_log(level, msg)
代码截图
Part 3:执行结果
level=logging.INFO
,输出 ≥ INFO级别的问题,输出了INFO,WARNING,ERROR,CRITICAL
INFOlevel=logging.DEBUG
,输出 ≥ DEBUG级别的问题,发现所有的都输出了DEBUG
level=logging.ERROR
,输出 ≥ ERROR级别的问题,输出了ERROR,CRITICAL
ERROR
Part 4:部分代码解读
logging.basicConfig
,设置输出日志各种参数format='日志生成时间:%(asctime)s 执行文件名:%(filename)s[line:%(lineno)d] 级别:%(levelname)s 输出信息:%(message)s'
filemode='a+
,在原文件基础上追加%(asctime)s
:时间,配合datefmt='%Y-%m-%d %A %H:%M:%S'
,定义输出时间格式%(filename)s
,所在文件[line:%(lineno)d]
:代码所在行%(message)s
:拟输出信息level=logging.INFO
,设置输出最低级别
输出结果
logging.critical
等,否则就失去很大一部分意义本文为原创作品,欢迎分享朋友圈