[Python-Dev] Re: [Python-checkins] python/dist/src/Pythoncompile.c, 2.330, 2.331

Phillip J. Eby pje at telecommunity.com
Mon Oct 25 20:12:29 CEST 2004

At 09:36 AM 10/25/04 -0700, Guido van Rossum wrote:
> > I can't think of an application where the current behaviour would be of
> > great benefit. It's always possible to create a tuple of the fields you 
> want
> > in the comparison. Unless it caused a drop in performance, I'd be in favour
> > of only having identity comparison for code objects.
>Well, then perhaps code object comparison (and function object
>comparison) ought to work the same as 'is', not try to do something

Isn't that what function objects do now? (for some value of "now")

Python 2.3.4 (#1, Jun 13 2004, 11:21:03)
[GCC 3.3.1 (cygming special)] on cygwin
Type "help", "copyright", "credits" or "license" for more information.
 >>> l = [lambda:None for i in 0,1]
 >>> l[0]==l[1]
 >>> l[0].func_code is l[1].func_code

It would seem that two lambdas with no default arguments, no free 
variables, and identical code objects would be "equal" if we were using 
value comparison, rather than identity.

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