Ah, you're running into the "old-style classes vs. new style classes". Try subclassing from "object".
For example: >>> class A(object): ... pass ... >>> a=A() >>> type(a) <class '__main__.A'> >>> type(a) == A True >>> type(a) is A True >>> b=A() >>> type(a) == type(b) True >>> type(a) is type(b) True Check out the following article, it should answer your questions: http://www.python.org/doc/2.2.3/whatsnew/sect-rellinks.html#SECTION000310000000000000000 -e -- http://mail.python.org/mailman/listinfo/python-list
