[issue2041] __getslice__ still called
Mark Dickinson
report at bugs.python.org
Thu Feb 7 19:44:22 CET 2008
Mark Dickinson added the comment:
I think the docs do a good job of explaining this; in particular, they
say,
in http://docs.python.org/dev/reference/datamodel.html#special-method-
names:
"However, built-in types in CPython currently still implement
__getslice__()."
and explain that __getslice__ is used only to implement the form a[i:j],
and
falls back to __getitem__ if __getslice__ is not implemented.
Getting rid of __getslice__ for builtin types in Python 2.x is probably
one
of those things that would break backwards compatibility. And leaving
it in
is pretty harmless. To avoid surprises, don't implement __getslice__ in
your
own classes. But note that __getslice__ and friends are gone in Python
3.0.
I'd recommend closing this as invalid, but I'll wait for a second
opinion.
----------
nosy: +marketdickinson
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