"Kay Schluehr" <[EMAIL PROTECTED]> wrote: > George Sakkis wrote: > > > This would be very > > useful for list/generator comprehensions, for example being able to > write something like: > > > > [x*y-z for (x,y,z=0) in (1,2,3), (4,5), (6,7,8)] > > > > Looks very appealing, but what to do with > > [x*y-z for (x=0,y,z) in (1,2,3), (4,5), (6,7,8)] ? > > Should it raise an exception due to a pattern mismatch?
I didn't have in mind to generalize the syntax even more than the respective for function signatures, therefore this would be syntax error: SyntaxError: non-keyword arg after keyword arg > If not how should matching rules apply here? > > [x*y-z for (x=0,y=0,z=0) in (1,2,3), (4,5), (6,7,8)] > > If in doubt write a vector class that cares about the correct padding ( > or more general and with geometric meaning: select the right hyperplane > ) and enable to switch between different paddings. This solution is > both flexible and reusable. > > Regards Kay This was just an example; I think the proposed functionality will be helpful in far more cases than dealing with geometry or vectors, so I would prefer it to be supported by the language itself. Regards, George -- http://mail.python.org/mailman/listinfo/python-list
