Question on try/except

[Kirk McDonald]

Dan wrote:
> While perusing sre.py in the standard library, I came upon this snippet 
> of code in the _compile() function definition:
> 
>     try:
>         p = sre_compile.compile(pattern, flags)
>     except error, v:
>         raise error, v # invalid expression
> 
> Is there some particular use in catching an exception and immediately 
> re-raising it?  Why catch it at all?
> 
> /Dan
> 

All I can think of is that it changes the traceback to point to the 
re-raise and not the original raise.

-Kirk McDonald