python的异常捕获与抛出

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

try:
    i = 1/0
except:
    # 只写一个except会捕捉所有的异常
    print("error")


try:
    sum = 1 + '1'
    f = open('aaaaa.txt')
    print(f.read())
except (OSError, TypeError):
    # 同时对多个异常的处理
    print('出错了')


try:
    i = 10 /2
except ZeroDivisionError as e:
    print(e)
else:
    # 如果没有发生异常，会继续执行else语句的
    print('no error')


try:
    i = 10 / 2
    # 主动抛出一个异常
    raise ZeroDivisionError
except:
    print('捕获抛出异常')