[Python-Dev] Re: anonymous blocks (original) (raw)

Phillip J. Eby pje at telecommunity.com
Wed Apr 27 17:01:27 CEST 2005

At 12:30 AM 4/27/05 -0700, 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

Very nice. It's not clear from the text, btw, if normal exceptions can be passed into next, and if so, whether they can include a traceback. If they can, then generators can also be considered co-routines now, in which case it might make sense to call blocks "coroutine blocks", because they're basically a way to interleave a block of code with the execution of a specified coroutine.

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