[Python-ideas] __iter__ implies __contains__?

[Chris Rebert]

On Sat, Oct 1, 2011 at 6:14 PM, Steven D'Aprano <steve at pearwood.info> wrote:
<snip>
> Requiring collection to explicitly inherit from a Sequence ABC breaks duck
> typing and is anti-Pythonic.

Actually, my suggestion was just that Sequence is one possible (but
clean) way to obtain the behavior; one could *of course* reimplement
the functionality without recourse to Sequence if they desired.

Cheers,
Chris