[Python-Dev] Short-circuiting iterators (original) (raw)

Raymond Hettinger raymond.hettinger at verizon.net
Wed Dec 7 03:58:50 CET 2005

[Matthew F. Barnes]

> > Perhaps it would be a useful addition to the itertools > > module then? > > > > itertools.interruptable(iterable)

[Raymond Hettinger]

> Any real-world use cases or compelling contrived examples?

[Simon Wittber]

I use something like this in the nanothreads module.

http://metaplay.dyndns.org:8081/svn/fibranet/fibranet/nanothreads.py This feature is implemented in the Fibra class, in the end and kill methods. It is used to stop an iterator from parts of the code which are not part of the loop that is actually iterating the iterator. This usage is specific to situations where generators are being used as cooperative threads.

Are there any generator specific needs that are not met by the PEP 342 implementation? Given a choice between throw(), close(), and send(), I would have thought that all the bases have been covered.

Raymond

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