MRAB wrote, on Wednesday, March 15, 2017 3:19 PM > > On 2017-03-15 22:03, Gregory Ewing wrote: > > Steve D'Aprano wrote: > >> You probably can't make a whale fly just by changing the class to > >> bird. It will need wings, and feathers, at the very least. > > > > Some things succeed in flying with neither wings nor feathers. > > Helicopters, for example. > > > Could you argue that the blades were a kind of wing? After all, they > rely on the same principle of moving through the air to produce lift. > > Balloons, on the other hand, ... :-)
or kites... ;) -- https://mail.python.org/mailman/listinfo/python-list