day15——异常常用形式、异常处理方法、raise关键字的使用

 1 try:
 2     a = 10
 3     b = 0
 4     a/b
 5 except Exception as e:
 6     print(e)
 7     print(‘Error‘)
 8 else:
 9     print(‘This is OK!‘)
10 finally:
11     print(‘END‘)
12 
13 #object 这个是所有类的基类
14 #Exception 这个类是所有异常类的基类
15 
16 a = [1,2,4]
17 try:
18     print(a[4])
19 except IndexError as e:
20     print(e)

 1 try:
 2     10 / 0
 3 except Exception as e:
 4     print ‘aaaaaa‘, e
 5     raise e
 6 else:
 7     print(‘OK‘)
 8 finally:
 9     print("finally")
10 print("hello world")