On Fri, Sep 18, 2009 at 1:10 PM, Gabriel Genellina
gagsl-...@yahoo.com.ar wrote:
En Fri, 18 Sep 2009 14:38:08 -0300, Christian Heimes li...@cheimes.de
escribió:
Jamie Riotto schrieb:
I have an app that uses Python scripting. When a user creates a new
object:
objName = newObject()
I'd like the newObject be able to use objName as its internal name.
As the others already explained to you there is no way to archive your
goal with an assignment to a local or global variable. But you can
follow a different approach:
class Scene(object):
def __setattr__(self, name, value):
super(Scene, self).__setattr__(name value)
if isinstance(value, SceneObject):
value.name = name
value.scene = self
class SceneObject(object):
pass
class Cube(SceneObject):
pass
scene = Scene()
scene.cube1 = Cube()
As the OP said it's being used for scripting some application, presumably
the application can control the environment on which the script is run. One
may use the Scene class above as the globlal scope when executing the
script:
scene = Scene()
code = cube1 = Cube(); print cube1.name
exec code in Scene
(well, not exactly, Scene should inherit from dict and override __setitem__
instead, but you get the idea)
--
Gabriel Genellina
--
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Thanks for the detailed clarifications and suggestions. I understand
the problem a lot better now.
However, I'll have to keep looking for a more elegant solution.
Telling a user that typing:
cube1 = Cube(name = cube1) is a good thing because its pythonic is
somehow unsatisfying.
Also, in the last suggestion about execution the script in the Scene
Handler global scope, well thats
exactly what I do, and yes, cube1=Cube, print cube1.name works great.
The issue is say perhaps that
cube then collides with something called sphere1. How does cube1 know
that it hit sphere1 and not
just a sphere object. Since I can execute the scripts one line at a
time, I suppose I could search dictionaries
for new names pointing to the same object after every execution, but Yuck.
Perhaps the best approach is a preprossesor that looks for lines of
the form name = class() and adds in the
class(name = name) behind the scenes. Thanks again - jamie
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