[Python-Dev] PEP 343 - Abstract Block Redux

[Phillip J. Eby]

At 09:53 PM 5/16/2005 +1000, Nick Coghlan wrote:

>My PEP punts on providing a general API for passing exceptions into 
>generators
>by making it an internal operation.

Actually, the proposals you made almost subsume PEPs 288 and 325.  All 
you'd need to do is:

1. move the '__del__' code to a 'close()' method and make __del__ call close()
2. make '_inject_exception()' a public API that returns the next yielded 
value if the exception doesn't propagate

And just like that you've cleaned up the open issues from both 288 and 325, 
IIRC those open issues correctly.

I personally think that StopIteration, TerminateIteration, 
KeyboardInterrupt and perhaps certain other exceptions should derive from 
some base class other than Exception (e.g. Raisable or some such) to help 
with the bare-except/except Exception problem.  But that's probably best 
addressed by a separate PEP.  :)