RELEASED Python 3.0 final

Fernando H. Sanches fernandohsanches at
Fri Dec 5 21:16:47 CET 2008

On Dec 4, 5:45 pm, Andreas Waldenburger <geekm... at> wrote:
> On Thu, 4 Dec 2008 11:52:38 -0600 s... at wrote:
> >     >>> As you have probably guessed: nothing changed here.
> >     >>> Also see:
> >     >> What? Do you mean it's possible to mix tabs and spaces still?
> >     >> Why?
> >     Daniel> Why not?
> > Because it has historically been a source of errors in a mixed
> > development environment (people using text editors with different tab
> > stops).  Better to not allow them to be mixed.
> Whenever has it been a pythonic ideal to "not allow" stuff? You get
> warnings. Everything else is up to you.
> /W
> --
> My real email address is constructed by swapping the domain with the
> recipient (local part).

Python has "not allowed stuff" for a long time.

For example, it disallows statements in lambdas.

"Disallowing" is not bad. Disallowing bad practices (like mixing tabs
and spaces) is actually good!

I agree that the tab/space thing should be changed. Would it be too
hard to make the parser see if the indentation is consistent in the
whole file? This is a annoying source of problems, specially since you
can't tell a whitespace from a tab just looking at it.

And I personally disliked most of the changes (specially the ones on
map and reduce). I hope functional programming doesn't get even more
hindered in future releases, because I believe these changes only made
Python weaker.

Well, anyway, congratulations for everyone for Python 3 release. Some
of the changes were a real improvement (like the Unicode sources). And
I hope that, in the end, these changes help making Python a better

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