Am 25.12.2011 15:04, schrieb Chris Angelico: > I think there are certain types that are actually not implemented as > classes, and hence cannot be subclassed. This is almost certainly an > implementation detail though; my testing was done in Py3.2 (on Windows > fwiw).
Some extension types are not subclass-able on purpose. The feature isn't available to heap types. http://docs.python.org/c-api/typeobj.html#Py_TPFLAGS_BASETYPE Most people have never noticed the deliberate limitation because only a few special types are sub-classable. Christian -- http://mail.python.org/mailman/listinfo/python-list
