(heap, item)
Push item onto heap, maintaining the heap invariant.
Push item onto heap, maintaining the heap invariant.
Push item onto heap maintaining the heap invariant .
def heappush(heap, item):
    """Push item onto heap, maintaining the heap invariant."""
    heap.append(item)
    _siftdown(heap, 0, len(heap)-1)
def heappush ( heap , item ) : heap . append ( item ) _siftdown ( heap , 0 , len ( heap ) - 1 )