I have a class that derives from Exception. In Python 2.4, isinstance(MyClass(), types.InstanceType) was True. In 2.5, it's False.
Further experimentation showed that derivation from object was the culprit; new-style objects are not considered "instances" in the above sense. I wasn't able to figure out a workaround. Is there one, or is the distinction between traditional classes and built-in types only going to get more and more hazy? -- http://mail.python.org/mailman/listinfo/python-list
