Re: [Python-ideas] immutable classes [was: pre-PEP: Default Argument Expressions]

Feb. 18, 2007


      Well, except that Raymond's is indeed better -- so consider this a
request for inclusion in 2.6

On 2/17/07, Josiah Carlson <jcarlson@uci.edu> wrote:
...
"Jim Jewett" <jimjjewett@gmail.com> wrote:
...
...
...
...
class Vector3D(tuple):
...         def __new__(self, x, y, z):
...             return super(Vector3D, self).__new__(self, (x, y, z))
...         x=property(lambda self: self[0])
...         y=property(lambda self: self[1])
...         z=property(lambda self: self[2])
That looks very much like Raymond Hettinger's named tuple recipe,
recently offered in python-dev:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/500261
-jJ