Python异常处理

Python异常处理

重定向异常

import sys

def my_exception_hook(exc_type, exc_value, exc_tb):
    sys.__excepthook__(exc_type, exc_value, exc_tb)

if __name__ == '__main__':
	sys.excepthook = my_exception_hook
	print(1/0)

sys.excepthook(exctype, value, traceback)为python内置异常处理方法
调用sys.exc_info()可以获得元组（exc_type, exc_value, exc_tb）

traceback模仿堆栈跟踪

import sys
import traceback

def my_exception_hook(exc_type, exc_value, exc_tb):
    traceback.print_exception(exc_type, exc_value, exc_tb)
    sys.__excepthook__(exc_type, exc_value, exc_tb)

if __name__ == '__main__':
	sys.excepthook = my_exception_hook
	print(1/0)

模块traceback提供一个标准接口，用于提取，格式和打印Python程序的堆栈痕迹，模仿了Python解释器在打印堆栈跟踪时的行为

对异常直接进行调试

import sys
import pdb

def my_exception_hook(exc_type, exc_value, exc_tb):
    sys.__excepthook__(exc_type, exc_value, exc_tb)
    pdb.pm()

if __name__ == '__main__':
	sys.excepthook = my_exception_hook
	print(1/0)

pdb是python自带的调试模块