def _overload_dummy(*args, **kwds):
 raise NotImplementedError(u'You should not call an overloaded function. A series of @overload-decorated functions outside a stub module should always be followed by an implementation that is not @overload-ed.')

def _overload_dummy ( * args , ** kwds ) : raise NotImplementedError ( u'You should not call an overloaded function. A series of @overload-decorated functions outside a stub module should always be followed by an implementation that is not @overload-ed.' )
helper for @overload to raise when called .