def main():
pq = PriorityQueue.PQueue(elems=[1, 2, 3, 4, 4, 5, 6, 7, 33, 55, 564, 7658, 2233, 9, 44, 5, 33, 34])
print(pq)
pq.add(44)
pq.add(23)
result = []
while not pq.isEmpty():
result.append(pq.poll())
print(pq)
print(result)
