Python中except：和except Exception之间的区别，例如e：

Question

以下两个代码段都执行相同的操作。他们捕获每个异常并执行except:块中的代码

片段1-

try:
    #some code that may throw an exception
except:
    #exception handling code

摘要2-

try:
    #some code that may throw an exception
except Exception as e:
    #exception handling code

两种结构到底有什么区别？

Answer 1

在第二个中，您可以访问异常对象的属性：

>>> def catch():
...     try:
...         asd()
...     except Exception as e:
...         print e.message, e.args
... 
>>> catch()
global name 'asd' is not defined ("global name 'asd' is not defined",)

但是它不会捕获BaseException或系统退出异常SystemExit，KeyboardInterrupt并且GeneratorExit：

>>> def catch():
...     try:
...         raise BaseException()
...     except Exception as e:
...         print e.message, e.args
... 
>>> catch()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 3, in catch
BaseException

除了一个裸露的：

>>> def catch():
...     try:
...         raise BaseException()
...     except:
...         pass
... 
>>> catch()
>>>

有关更多信息，请参见文档的“内置异常”部分和本教程的“错误与异常”部分。