python logging日志捕获代码异常（traceback）

捕获traceback

Python中的traceback模块被用于跟踪异常返回信息，可以在logging中记录下traceback，

代码：

import logging
logger = logging.getLogger(__name__)
logger.setLevel(level = logging.INFO)
handler = logging.FileHandler("log.txt")
handler.setLevel(logging.INFO)
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
handler.setFormatter(formatter)

console = logging.StreamHandler()
console.setLevel(logging.INFO)

logger.addHandler(handler)
logger.addHandler(console)

logger.info("Start print log")
logger.debug("Do something")
logger.warning("Something maybe fail.")
try:
    open("sklearn.txt","rb")
except (SystemExit,KeyboardInterrupt):
    raise
except Exception:
    logger.error("Faild to open sklearn.txt from logger.error",exc_info = True)

logger.info("Finish")

#在这里也可以将日志捕获异常编写成一个通用类，然后尽量分各种类型的traceback去编写捕获方法
#后续实现了会贴出代码来~

也可以使用logger.exception(msg,_args)，它等价于logger.error(msg,exc_info = True,_args)，

将

logger.error("Faild to open sklearn.txt from logger.error",exc_info = True)

替换为，

logger.exception("Failed to open sklearn.txt from logger.exception")

控制台和日志文件log.txt中输出，

参考:https://www.cnblogs.com/wf-linux/archive/2018/08/01/9400354.html

Start print log
Something maybe fail.
Failed to open sklearn.txt from logger.exception
Traceback (most recent call last):
  File "G:\zhb7627\Code\Eclipse WorkSpace\PythonTest\test.py", line 23, in <module>
    open("sklearn.txt","rb")
IOError: [Errno 2] No such file or directory: 'sklearn.txt'
Finish