Why I cannot Exit python shell ??

[Fredrik Lundh]

Jia Lu wrote:

>   After using python shell (IDLE) for a while, I typed commands below
> to exit . But error ocurred.
> 
>>>> raise SystemExit
> 
> Traceback (most recent call last):
>   File "<pyshell#10>", line 1, in <module>
>     raise SystemExit
> SystemExit
>>>> sys.exit(0)
> 
> Traceback (most recent call last):
>   File "<pyshell#11>", line 1, in <module>
>     sys.exit(0)
> SystemExit: 0
>>>> dir()
> ['__builtins__', '__doc__', '__name__', 'os', 'sys', 'time']
> 
> Why??

because IDLE catches all exceptions, including SystemExit.  to quit 
IDLE, just type "quit()", or close the window.

</F>