Comments on: Writing generator friendly code

By: Anonymous

Anonymous — Thu, 04 Mar 2010 05:23:41 +0000

The problem with passing generators to functions is that even if they don’t call len or need arbitrary access, they may want to walk through the list twice. That works fine for generator objects like xrange, but if not if you are using a generator function or generator expression.

By: Jason C

Jason C — Tue, 02 Mar 2010 22:11:08 +0000

You might find this question on Stack Overflow interesting:
http://stackoverflow.com/questions/2322642/index-and-slice-a-generator-in-python

By: Edward Z. Yang

Edward Z. Yang — Tue, 02 Mar 2010 19:25:40 +0000

It’s not as effortless as in a lazy language, where you don’t need to tee the lazy list at all. The generator is mutating state under-the-hood, which means you have to be very careful if you’re passing them around.

By: Michael Foord

Michael Foord — Tue, 02 Mar 2010 19:19:14 +0000

Forking an infinite generator is hard? Doesn’t itertools.tee do that for you?

http://docs.python.org/library/itertools.html#itertools.tee