()
return (Bus(g) for k, g in groupby(
            sorted(core.find(find_all=True), key=lambda d: d.bus),
            lambda d: d.bus))
r"""Returns a tuple with the usb busses.
r"""Returns a tuple with the usb busses.
r Returns a tuple with the usb busses .
def busses():
    r"""Returns a tuple with the usb busses."""
    return (Bus(g) for k, g in groupby(
            sorted(core.find(find_all=True), key=lambda d: d.bus),
            lambda d: d.bus))
def busses ( ) : return ( Bus ( g ) for k , g in groupby ( sorted ( core . find ( find_all = True ) , key = lambda d : d . bus ) , lambda d : d . bus ) )