Hello, this is just a clarification of a bug reported by Predrag Radovic: http://lists.ironpython.com/pipermail/users-ironpython.com/2006-May/002278.html # test.py class C: def m(self): pass m.x = 1 im = C.m print im.x # CPython 1 # IronPython AttributeError: 'instancemethod' object has no attribute 'x' Seo Sanghyeon