Guido van Rossum wrote:
I've written a PEP about this topic. It's PEP 340: Anonymous Block Statements (http://python.org/peps/pep-0340.html).
Some highlights:
- temporarily sidestepping the syntax by proposing 'block' instead of 'with' - __next__() argument simplified to StopIteration or ContinueIteration instance - use "continue EXPR" to pass a value to the generator - generator exception handling explained
This looks pretty cool. Some observations: 1. It looks to me like a bare return or a return with an EXPR3 that happens to evaluate to None inside a block simply exits the block, rather than exiting a surrounding function. Did I miss something, or is this a bug? 2. I assume it would be a hack to try to use block statements to implement something like interfaces or classes, because doing so would require significant local-variable manipulation. I'm guessing that either implementing interfaces (or implementing a class statement in which the class was created before execution of a suite) is not a use case for this PEP. Jim -- Jim Fulton mailto:jim@zope.com Python Powered! CTO (540) 361-1714 http://www.python.org Zope Corporation http://www.zope.com http://www.zope.org