使用python的日志记录模块记录所有异常和错误 [英] Using python's logging module to log all exceptions and errors

问题描述

我想检查特定后台文件中的错误，但标准错误流由前台程序控制，并且问题文件中的错误未显示。我可以使用 logging 模块，然后将输出写入文件。我想知道如何使用它来记录所有异常，错误及其追溯。

I want to check for errors in a particular background file, but the standard error stream is being controlled by the program in the foreground and the errors in the file in the question are not being displayed. I can use the logging module and write output to a file, though. I was wondering how I can use this to log all exceptions, errors and their tracebacks.

推荐答案

这可能是一个坏主意， 在程序中抛出任何异常，因为Python也为正常的控制流程使用异常。

It's probably a bad idea to log any exception thrown within the program, since Python uses exceptions also for normal control flow.

因此，您只应该记录 em>例外。您可以使用记录器的 exception（）方法，一旦你有一个异常对象。

Therefore you should only log uncaught exceptions. You can easily do this using a logger's exception() method, once you have an exception object.

要处理所有未捕获的异常，您可以将脚本的入口点包装在$ code> try ...除了块，或者通过重新分配 sys.excepthook（） ：

To handle all uncaught exceptions, you can either wrap your script's entry point in a try...except block, or by installing a custom exception handler by re-assigning sys.excepthook():

import logging
import sys

logger = logging.getLogger('mylogger')
# Configure logger to write to a file...

def my_handler(type, value, tb):
    logger.exception("Uncaught exception: {0}".format(str(value)))

# Install exception handler
sys.excepthook = my_handler

# Run your main script here:
if __name__ == '__main__':
    main()

这篇关于使用python的日志记录模块记录所有异常和错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！