[Python-Dev] Re: PEP 289 - Generator Expressions - Let's MoveForward

[Tim Peters]

>> Listcomps can be deprecated, although not all existing uses of listcomps
>> will translate directly into genexps.

[David Eppstein]
> Not all?  When would [listcomp] ever not be replaceable by list(gencomp)?

The point of Armin's original msg in this thread was that direct replacement
can have different semantics.  Applying a transformation (via list()) is a
different story, although I expect someone obsessed enough could concoct an
example that worked differently, because genexp guts truly live in a
different scope than listcomp guts (e.g., play games with locals()).