Python--032异常处理：你不可能总是对的

游戏小虾米

Tip：
异常可以告诉哪里出了什么错

一，理论
http://bbs.fishc.com/thread-45814-1-2.html
Python标准异常总结

二，应用
1
>>> list = []
>>> assert len(list) > 0
Traceback (most recent call last):
  File "<pyshell#1>", line 1, in <module>
    assert len(list) > 0
AssertionError

2
>>> list.fishC()
Traceback (most recent call last):
  File "<pyshell#2>", line 1, in <module>
    list.fishC()
AttributeError: 'list' object has no attribute 'fishC'

3
>>> list[1]
Traceback (most recent call last):
  File "<pyshell#3>", line 1, in <module>
    list[1]
IndexError: list index out of range

4
>>> my_dict = {'one':1, 'six one eight':618}
>>> my_dict['eleven eleven']
Traceback (most recent call last):
  File "<pyshell#5>", line 1, in <module>
    my_dict['eleven eleven']
KeyError: 'eleven eleven'

5
>>> fishC
Traceback (most recent call last):
  File "<pyshell#6>", line 1, in <module>
    fishC
NameError: name 'fishC' is not defined

6
>>> f = open('F:\\readme.txt')
Traceback (most recent call last):
  File "<pyshell#7>", line 1, in <module>
    f = open('F:\\readme.txt')
FileNotFoundError: [Errno 2] No such file or directory: 'F:\\readme.txt'

7
>>> print 'cangjingkong'
SyntaxError: Missing parentheses in call to 'print'

8
>>> 1 + '1'
Traceback (most recent call last):
  File "<pyshell#9>", line 1, in <module>
    1 + '1'
TypeError: unsupported operand type(s) for +: 'int' and 'str'

>>> 5 / 0
Traceback (most recent call last):
  File "<pyshell#10>", line 1, in <module>
    5 / 0
ZeroDivisionError: division by zero


三，课后练习