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Python异常处理体系简介

Python内建异常体系结构
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
捕获异常的方式
方法一:捕获所有的异常
 ''' 捕获异常的第一种方式,捕获所有的异常 '''
try:
a = b
b = c
except Exception,data:
print Exception,":",data
'''输出:<type 'exceptions.Exception'> : local variable 'b' 
referenced before assignment ''
方法二:采用traceback模块查看异常,需要导入traceback模块
''' 捕获异常的第二种方式,使用traceback查看异常 '''
try:
a = b
b = c
except:
print traceback.print_exc()
'''输出


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