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Groups > comp.lang.python > #5277

Re: list equal to subclass of list?

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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.

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Thread

list equal to subclass of list? Roy Smith <roy@panix.com> - 2011-05-12 08:23 -0400
  Re: list equal to subclass of list? Ethan Furman <ethan@stoneleaf.us> - 2011-05-12 09:43 -0700
    Re: list equal to subclass of list? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-05-13 00:18 +0000
      Re: list equal to subclass of list? Ethan Furman <ethan@stoneleaf.us> - 2011-05-12 18:04 -0700
    Re: list equal to subclass of list? Roy Smith <roy@panix.com> - 2011-05-12 21:53 -0400
  Re: list equal to subclass of list? Ethan Furman <ethan@stoneleaf.us> - 2011-05-12 11:29 -0700
    Re: list equal to subclass of list? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-05-12 22:40 +0200
    Re: list equal to subclass of list? Roy Smith <roy@panix.com> - 2011-05-12 13:49 -0700
      Re: list equal to subclass of list? Ethan Furman <ethan@stoneleaf.us> - 2011-05-12 14:48 -0700

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