how to use except statement in python

1>>> def divide(x, y):
2...     try:
3...         result = x / y
4...     except ZeroDivisionError:
5...         print("division by zero!")
6...     else:
7...         print("result is", result)
8...     finally:
9...         print("executing finally clause")
10...
11>>> divide(2, 1)
12result is 2.0
13executing finally clause
14>>> divide(2, 0)
15division by zero!
16executing finally clause
17>>> divide("2", "1")
18executing finally clause
19Traceback (most recent call last):
20  File "<stdin>", line 1, in <module>
21  File "<stdin>", line 3, in divide
22TypeError: unsupported operand type(s) for /: 'str' and 'str'
23