Question

我应该从两个文件中读取。一个包含数字（其中混有无效字符），另一个包含运算符。程序在达到异常后停止，但是我需要它来继续读取数字文件。我尝试过pass关键字没有运气。

try:
    with open('numbers.txt') as file1, open('operators.txt') as file2:
        for no1, no2, op in itertools.zip_longest(file1, file1, file2):
            result = eval(no1.rstrip() + op.rstrip() + no2.rstrip())
            print(no1.rstrip() + op.rstrip() + no2.rstrip() + ' = ' + str(result))
except IOError:
    print('File cannot be found or opened')
    exit()
except ZeroDivisionError:
    print(no1.rstrip() + op.rstrip() + no2.rstrip() + ' - Division by 0 is not allowed')
except NameError:
    print(no1.rstrip() + op.rstrip() + no2.rstrip() + ' - Cannot perform operation with characters')

我将非常感谢您的帮助。

Answer 1

您可以将continue或pass语句添加到except块中。将异常抛出循环，并添加continue或pass语句。选中此Answer以供参考。

Answer 2

拆分try-except块并将可忽略的错误移至for循环内：

import itertools

try:
    with open('numbers.txt') as file1, open('operators.txt') as file2:
        for no1, no2, op in itertools.zip_longest(file1, file1, file2):
            try:
                result = eval(no1.rstrip() + op.rstrip() + no2.rstrip())
                print(no1.rstrip() + op.rstrip() + no2.rstrip() + ' = ' + str(result))
            except ZeroDivisionError:
                print(no1.rstrip() + op.rstrip() + no2.rstrip() + ' - Division by 0 is not allowed')
            except NameError:
                print(no1.rstrip() + op.rstrip() + no2.rstrip() + ' - Cannot perform operation with characters')
except IOError:
    print('File cannot be found or opened')
    exit()

异常后如何继续程序？

2 个答案: