如何记录Python异常?

try:
    do_something()
except:
    # How can I log my exception here, complete with its traceback?

当前回答

我要找的是:

import sys
import traceback

exc_type, exc_value, exc_traceback = sys.exc_info()
traceback_in_var = traceback.format_tb(exc_traceback)

看到的:

https://docs.python.org/3/library/traceback.html

其他回答

未捕获的异常消息将发送到STDERR,因此,您可以使用任何用于运行Python脚本的shell将STDERR发送到文件中,而不是在Python中实现日志记录。在Bash脚本中,您可以使用输出重定向来实现这一点,如Bash指南中所述。

例子

附加错误文件,其他输出到终端:

./test.py 2>> mylog.log

覆盖交错的STDOUT和STDERR输出文件:

./test.py &> mylog.log

我要找的是:

import sys
import traceback

exc_type, exc_value, exc_traceback = sys.exc_info()
traceback_in_var = traceback.format_tb(exc_traceback)

看到的:

https://docs.python.org/3/library/traceback.html

下面是一个简单的例子,摘自python 2.6文档:

import logging
LOG_FILENAME = '/tmp/logging_example.out'
logging.basicConfig(filename=LOG_FILENAME,level=logging.DEBUG,)

logging.debug('This message should go to the log file')

使用exc_info选项可能更好,保留警告或错误标题:

try:
    # coode in here
except Exception as e:
    logging.error(e, exc_info=True)

我就是这么做的。

try:
    do_something()
except:
    # How can I log my exception here, complete with its traceback?
    import traceback
    traceback.format_exc() # this will print a complete trace to stout.