def _Intersect(handler_list):
 if (not handler_list):
  return set()
 handlers = set([handler_list[0]])
 for input_handler in handler_list[1:]:
  new_handlers = set()
  for g in handlers:
   new_handlers |= _IntersectTwoHandlers(input_handler, g)
  handlers = new_handlers
 return list(handlers)

def _Intersect ( handler_list ) : if ( not handler_list ) : return set ( ) handlers = set ( [ handler_list [ 0 ] ] ) for input_handler in handler_list [ 1 : ] : new_handlers = set ( ) for g in handlers : new_handlers |= _IntersectTwoHandlers ( input_handler , g ) handlers = new_handlers return list ( handlers )
returns an unordered list of all possible intersections of handlers .