var or inout parm?
Marc 'BlackJack' Rintsch
bj_666 at gmx.net
Sat Dec 13 06:23:25 EST 2008
On Sat, 13 Dec 2008 02:20:59 +0100, Hrvoje Niksic wrote:
> Saner (in this respect) behavior in the tuple example would require a
> different protocol. I don't understand why Python doesn't just call
> __iadd__ for side effect if it exists. The decision to also rebind the
> result of __i*__ methods continues to baffle me. I guess it is a result
> of a desire to enable the __i*__ methods to punt and return a different
> instance after all, but if so, that design decision brings more problems
> than benefits.
How often do you use ``+=`` with mutable objects? I use it very often
with number types and sometimes with tuples, and there rebinding is
necessary. If I couldn't use it in this way: ``x = 0; x += z``, I'd
call that a bad design decision. It would be a quite useless operator
then.
Ciao,
Marc 'BlackJack' Rintsch
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