[Python-Dev] PEP 340 -- loose ends

[Greg Ewing]

Shane Hathaway wrote:
> For each block statement, it is necessary to create a *new* iterator,
> since iterators that have stopped are required to stay stopped.  So at a
> minimum, used-defined statements will need to call something, and thus
> will have parentheses.

Not necessarily!

   class Frobbing:

     def __neg__(self):
       begin_frobbing()
       try:
         yield
       finally:
        end_frobbing()

   frobbing = Frobbing()

   ...

   -frobbing:
     do_something()

-- 
Greg Ewing, Computer Science Dept, +--------------------------------------+
University of Canterbury,	   | A citizen of NewZealandCorp, a	  |
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