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From: Roy Smith <roy@panix.com>
Newsgroups: comp.lang.python
Subject: Re: list equal to subclass of list?
Date: Thu, 12 May 2011 21:53:05 -0400
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In article <mailman.1479.1305217887.9059.python-list@python.org>,
 Ethan Furman <ethan@stoneleaf.us> wrote:

> > [http://docs.python.org/library/stdtypes.html]
> > Objects of different types, except different numeric types and different 
> > string types, never compare equal
> 
> This part of the documentation is talking about built-in types, which 
> your MyList is not.
> 
> 
> > [http://docs.python.org/release/2.7/reference/expressions.html#notin]
> > objects of different types *always* compare unequal
> 
> Should probably have the word 'built-in' precede 'types' here, since 
> constructed objects can do whatever they have been told to do.

Changing the docs (in numerous places) to make it clear that this is 
only true of built-in types would indeed resolve the problem.  As it 
reads now, it's a general statement about ALL types, built-in or 
user-defined.