想象下面的代码。
进行一些设置：例如，您负责维护一个巨大的信息数据库，任何数据丢失将是灾难性的！
huge_dictionary = {'lots_of_important':['stuffs']}try: check_data(new_data) #make sure the data is in the correct format huge_dictionary['lots_of_important'].append(new_data)except: data_writer.backup(huge_dictionary) data_writer.close() #and any other last second changes raise
