python异常处理

BaseException
+-- SystemExit
+-- KeyboardInterrupt
+-- GeneratorExit
+-- Exception
+-- StopIteration
+-- StandardError
|    +-- BufferError
|    +-- ArithmeticError
|    |    +-- FloatingPointError
|    |    +-- OverflowError
|    |    +-- ZeroDivisionError
|    +-- AssertionError
|    +-- AttributeError
|    +-- EnvironmentError
|    |    +-- IOError
|    |    +-- OSError
|    |         +-- WindowsError (Windows)
|    |         +-- VMSError (VMS)
|    +-- EOFError
|    +-- ImportError
|    +-- LookupError
|    |    +-- IndexError
|    |    +-- KeyError
|    +-- MemoryError
|    +-- NameError
|    |    +-- UnboundLocalError
|    +-- ReferenceError
|    +-- RuntimeError
|    |    +-- NotImplementedError
|    +-- SyntaxError
|    |    +-- IndentationError
|    |         +-- TabError
|    +-- SystemError
|    +-- TypeError
|    +-- ValueError
|         +-- UnicodeError
|              +-- UnicodeDecodeError
|              +-- UnicodeEncodeError
|              +-- UnicodeTranslateError
+-- Warning
+-- DeprecationWarning
+-- PendingDeprecationWarning
+-- RuntimeWarning
+-- SyntaxWarning
+-- UserWarning
+-- FutureWarning
+-- ImportWarning
+-- UnicodeWarning
+-- BytesWarning

 1 #-*- coding: utf-8 -*-
 2 
 3 #自定义异常类
 4 class AuditException(Exception):
 5     def __init__(self, data):
 6         self.data = data
 7 
 8     def __str__(self):
 9         return self.data
10 
11 
12 
13 if __name__ == "__main__":
14     try:
15         raise AuditException, "The audit operation is not exist."
16     except AuditException, data:
17         print data #The audit operation is not exist.
18 
19     #或者
20 
21     try:
22         raise AuditException, "The audit operation is not exist."
23     except:
24         import traceback
25         traceback.print_exc()
26         

try:
    #do something
except:
    #如果引发了异常，do something
else:
    #如果未发生异常，do something

try:
    #do something
finally:
    #不管有没有异常，do something