Aaron Brady wrote: >>>> f.func_defaults[0] > [2, 3] >>>> f.func_defaults[0]+=[4] > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > TypeError: 'tuple' object does not support item assignment >>>> f.func_defaults[0] > [2, 3, 4] > > V. interesting. Operation succeeds but with a throw. Er, raise.
This is not specific to func_defaults: >>> t = ([1],) >>> t[0] += [2] Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: 'tuple' object does not support item assignment >>> t ([1, 2],) t[0] += [2] is resolved to t.__setitem__(t[0].__iadd__([2])) where list.__iadd__() succeeds but __setitem__() fails (because tuples don't have that method). Peter -- http://mail.python.org/mailman/listinfo/python-list
