About "Object in list" expression

[Jon Clements]

On Nov 2, 10:41 am, Mirons <ilmir... at gmail.com> wrote:
> Hi everybody! I'm having a very annoying problem with Python: I need
> to check if a (mutable) object is part of a list but the usual
> expression return True also if the object isn't there. I've
> implemented both __hash__ and __eq__, but still no result. what does
> "in" implementation use for comparison (Python is 2.6)?

It would help showing an example...