Is it just an implementation limitation that attributes cannot be assigned to instances of internal types?
--------------------------- >>> x = 4 >>> type(x) <type 'int'> >>> class Test(int): ... pass ... >>> y = Test(4) >>> type(y) <class '__main__.Test'> >>> y.someattr = 10 >>> x.someattr = 10 Traceback (most recent call last): File "<stdin>", line 1, in ? AttributeError: 'int' object has no attribute 'someattr' --------------------------- When I did a dir(int) there was no __dict__ entry, but a dir(Test) showed a __dict__entry, which is why (presumably) the attribute assignment worked for Test but not for int. Just curious... Dave -- http://mail.python.org/mailman/listinfo/python-list