collections 常用类型

from collections import defaultdict, Counter, deque

dd = defaultdict(list)
counter = Counter("hello")
dq = deque([1, 2, 3])

堆操作

import heapq

heap = [3, 1, 4, 1, 5]
heapq.heapify(heap)
print(heapq.heappop(heap))  # 1

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