Hi,
The __hash__ overload feature for *all* pythonOCC objects is in the svn
repository (rev.203) and has been successfully tested on both Windows
and Linux platforms. Thanks to Frank's precious advice, pythonOCC made a
huge step beyond since, from now, it becomes possible to handle OCC
objects
Hi Frank,
The __hash__ overload feature is available on the subversion repository
(rev.202). Just svn update and rebuild the solution. You can notice now
that the __hash__() and id() methods return different results. This
point is important: whenever you create a pythonOCC object (for instance
By the way, I have a related question, which may be more appropriate for
the OCC forums, since I know it is an OCC issue and not specific to
pythonocc. But maybe you OCC-gurus can help me out ;-)
Why is it that TopExp_Explorer sometimes returns the same shapes
multiple times, e.g. in my code I'
Hi Thomas
But this is exactly my problem, since for TopoDS_Shape objects, the id
is different for the same underlying occ object every time the shape is
retrieved (e.g. through TopExp explorer). Is this because id() returns
the address of the swig wrapper object, which is different every time i
Hello Franck,
It's really a good idea to map the Hash() OpenCascade method and the
python __hash__(). I read a few posts on the __hash__() topic. A good
one is, for instance:
http://mail.python.org/pipermail/python-dev/2003-September/037923.html .
It's said that 'object.__hash__() returns id(o
Hi Jelle
My particular need was to hash TopoDS_Shape objects properly. I'm not
sure if this is a good permanent solution, but this works for me, for
shapes at least:
def shape_hash(self):
return self.HashCode(sys.maxint)
TopoDS.TopoDS_Shape.__hash__ = shape_hash
Now I can use shapes in a
Life with pythonocc has become much better now that the == operator
works properly for pythonocc objects, but it would be so much easier if
objects would also "hash" based on the underlying OCC object.
E.g. if o1==o2, then hash(o1) == hash(o2)
This would make it possible to use pythonocc object
