Python中的异常类型

转自http://www.cppblog.com/Herbert/archive/2009/03/31/78486.html

1、NameError：尝试访问一个未申明的变量

>>> v

NameError: name 'v' is not defined

2、ZeroDivisionError：除数为0

>>> v = 1/0

ZeroDivisionError: int division or modulo by zero

3、SyntaxError：语法错误

>>> int int

SyntaxError: invalid syntax (<pyshell#14>, line 1)

4、IndexError：索引超出范围

>>> List = [2]

>>> List[3]

Traceback (most recent call last):

File "<pyshell#18>", line 1, in <module>

List[3]

IndexError: list index out of range

5、KeyError：字典关键字不存在

>>> Dic = {'1':'yes', '2':'no'}

>>> Dic['3']

Traceback (most recent call last):

File "<pyshell#20>", line 1, in <module>

Dic['3']

KeyError: '3'

6、IOError：输入输出错误

>>> f = open('abc')

IOError: [Errno 2] No such file or directory: 'abc'

7、AttributeError：访问未知对象属性

>>> class Worker:

def Work():

print("I am working")

>>> w = Worker()

>>> w.a

Traceback (most recent call last):

File "<pyshell#51>", line 1, in <module>

w.a

AttributeError: 'Worker' object has no attribute 'a'

8、ValueError：数值错误

>>> int('d')

Traceback (most recent call last):

File "<pyshell#54>", line 1, in <module>

int('d')

ValueError: invalid literal for int() with base 10: 'd'

9、TypeError：类型错误

>>> iStr = '22'

>>> iVal = 22

>>> obj = iStr + iVal;

Traceback (most recent call last):

File "<pyshell#68>", line 1, in <module>

obj = iStr + iVal;

TypeError: Can't convert 'int' object to str implicitly

10、AssertionError：断言错误

>>> assert 1 != 1

Traceback (most recent call last):

File "<pyshell#70>", line 1, in <module>

assert 1 != 1

AssertionError