(python)为什么sys.exc_info取不出值?
程序中调用
log_file = open('test.log', 'a')
etype = sys.exc_info()[0]
evalue = sys.exc_info()[1]
etb = traceback.extract_tb(sys.exc_info()[2])
log_file.write('Error in routine: your routine here\n')
log_file.write('Error Type: ' + str(etype) + '\n')
log_file.write('Error Value: ' + str(evalue) + '\n')
log_file.write('Traceback: ' + str(etb) + '\n')
log_file.close()
sys.exit()
来处理异常。
运行后,程序退出,但是对应的test.log中对应的etype,evalue,etb都是空的。问问这是为什么?