On Jun 26, 10:10 am, Paul Rubin <http://[EMAIL PROTECTED]> wrote: > Andy Freeman <[EMAIL PROTECTED]> writes: > > Compare that with what a programmer using Python 2.4 has to do if > > she'd like the functionality provided by 2.5's with statement. Yes, > > with is "just syntax", but it's extremely useful syntax, syntax that > > can be easily implemented with lisp-style macros. > > Not really.
Yes really, as the relevant PEP shows. The "it works like" pseudo- code is very close to how it would be defined with lisp-style macros. > The with statement's binding targets all have to support > the protocol, which means a lot of different libraries need redesign. That's a different problem, and it's reasonably solvable for anyone who wants to use the roll-your-own with while writing an application running under 2.4. (You just add the relevant methods to the appropriate classes.) The big obstacle is the syntax of the with-statement. There's no way to define it in python with user-code. -- http://mail.python.org/mailman/listinfo/python-list
