[Python-Dev] Are property descriptors intended to be immutable? (original) (raw)

Curt Hagenlocher curt at hagenlocher.org
Sat Feb 7 18:41:05 CET 2009


On Fri, Feb 6, 2009 at 4:04 PM, Guido van Rossum <guido at python.org> wrote:

On Fri, Feb 6, 2009 at 2:44 PM, Curt Hagenlocher <curt at hagenlocher.org> wrote:

...because they're not quite :). Should I file this as a bug report? No, this is just how it works. I hope they aren't documented as immuable?

Not that I know of :). But the individual properties of the descriptor are all read-only and that the implementations of setter, getter and deleter return new objects instead of mutating and returning the old descriptor. So it seemed a little odd that there was just one way remaining in which the object could be mutated.

(I'm a recent convert to the joys of immutability. :)

-- Curt Hagenlocher curt at hagenlocher.org



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