Symbol DistributedNode is not a class name.

Scripting Issues
#1

Hello, everyone!

While trying to use DistibutedNode’s w/ Panda 1.2.3, I wasn’t able to get around this error message:

Symbol DistributedNode is not a class name.

Since “plain” DistributedObject’s worked, I looked for errors in my code and setup.

When others’ code also failed (like panda.egg’s example from Panda 1.0 in this thread https://discourse.panda3d.org/viewtopic.php?t=320) i finally looked closer at the ServerRepository source. It turns out the patch below fixes this, presumable because DistributedNode is a new-style class and DistributedObject is a classic class? Correct me on this, I’m new to python.

--- ServerRepository.py	2006-05-25 02:33:32.000000000 +0200
+++ ServerRepository.patched.py	2006-06-14 16:00:17.771086088 +0200
@@ -149,7 +149,7 @@
                         self.notify.error("Module %s does not define class %s." % (className, className))
                     classDef = getattr(classDef, className)
 
-                if type(classDef) != types.ClassType:
+                if type(classDef) != types.ClassType and type(classDef) != types.ClassType.__class__:
                     self.notify.error("Symbol %s is not a class name." % (className))
                 else:
                     dclass.setClassDef(classDef)

I can’t find that anyone else has had this problem (or bothered the board with it), and I’m not quite sure were to post this, so it goes here.

cheers

#2

Right, this happens because DistributedNode inherits from NodePath, which is a C++ object, and this is not a python “class” but instead becomes a python “type”. It’s a subtle difference within Python, but for the most part you can treat them interchangeably.

A better patch would be to replace the line with:


if type(classDef) != types.ClassType and type(classDef) != types.TypeType:

which achieves the same thing, only a little bit clearer.

David