Maric Michaud wrote:
Le Tuesday 16 September 2008 15:57:53 Grant Edwards, vous avez écrit :
On 2008-09-16, Maric Michaud <[EMAIL PROTECTED]> wrote:
all expressions that return something, return a new object,
That's not _quite_ true:
a=1
b=a.__add__(0)
a is b
True
;)
This is implementation specific, the specification of the language says that
it should be false,
Please quote the section of the manual that says this.
> and it is for higher numbers :
Agaiin, this is implementation specific. An implementation would be
free to special-case any or all of +a, a+0, a-0, a*1, a//1, a**1, a<<0,
a>>0, and a|0 and return a. That CPython only optimizes the first is a
judgment that the other cases are too rare to bother with.
> Don't disturb our OP, with side questions, please, it was enough
hard like
this ;)
Stop peddling false information. For immutable objects, identity is
irrelevant except for id and is.
tjr
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