[Python-Dev] yield back-and-forth? (original) (raw)

Andrew Koenig ark at acm.org
Sat Jan 21 06:55:05 CET 2006

The discussion about PEP 343 reminds me of the following. Bram Cohen pointed out in private email that, before PEP 342, there wasn't a big need for a shortcut to pass control to a "sub-generator" because the following for-loop works well enough:

def maingenerator(): ... for value in subgenerator(): yield value

but now that yield can return a value, that value might have to be passed into subgenerator(), not to mention of exceptions. I'm sure there's a way to write that (although I haven't found the time to figure it out) but I expect it to be cumbersome and subtle.

It looks to me like continuations are starting to rear their heads...

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