python 异常处理

name = ["test","测试"]
data = {}


try:
    # open("oooo.txt")
    # name[3]
    # data["name"]
    a = 1
    print(a)

except (KeyError,IndexError) as e:
    print("没有这个key", e)

except KeyError as e:
    print("没有这个key",e)
except IndexError as e:
    print("列表操作错误",e)
except Exception as e:#抓取所有错误
    print("未知错误",e)
else :
    print('一切正常')

finally:
    print('不管有没有错，都执行')


#自定义异常
class WupeiqiException(Exception):

    def __init__(self, msg):
        self.message = msg

    def __str__(self):
        return self.message
try:
    raise WupeiqiException('我的异常')
except WupeiqiException as  e:
    print(e)