Urjit Bhatia <urjitsb87@gmail.com> added the comment: Using the same code example as above, I added a simple print statement in the set method being defined in the defproperty and it fired correctly for - a.childNodes[0].attributes='something' **My print statement:**in defproperty set for name: attributes Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/home/urjit/code/mercurial/python/cpython/Lib/xml/dom/minicompat.py", line 106, in set "attempt to modify read-only attribute " + repr(name)) xml.dom.NoModificationAllowedErr: attempt to modify read-only attribute 'attributes' The getter seems to work fine for localName but the setter somehow does not fire. I have a fix for this but when I am running the test on my ubuntu vm, it doesnt go beyond test_sndhdr. However, when I run that test directly, it is successful. I can submit a patch if this problem is fixed. ---------- nosy: +urjitsb87 _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue13127> _______________________________________