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Subject: Re: how to iterate all sub-element in a list
From: Skip Montanaro <skip@pobox.com>
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Xref: csiph.com comp.lang.python:65110

Google for "python flatten list."

This question comes up frequently, though I'm not sure if that's
because it's a common homework problem or because people are unaware
of the += operator (or extend method) for lists, and so build
lists-of-lists when they could just build them flat in the first
place.

Skip