命名元组
from collections import namedtuple Point = namedtuple("Point", ["x", "y"]) p = Point(3, 4) print(p.x) # 3 print(p.y) # 4
双端队列(double-end queue)
from collections import deque d = deque([1, 2, 3, 4, 5]) d.append(6) d.appendleft(0) print(d) # deque([0, 1, 2, 3, 4, 5, 6])
有序字典
from collections import OrderedDict od = OrderedDict() od["x"] = 1 od["y"] = 2 od["z"] = 3 print(od) # OrderedDict([('x', 1), ('y', 2), ('z', 3)])
计数器
from collections import Counter s = "abcdavbdafsdfasd" c = Counter(s) print(c) # Counter({'a': 4, 'd': 4, 'b': 2, 'f': 2, 's': 2, 'c': 1, 'v': 1}) print(c.most_common()) # [('a', 4), ('d', 4), ('b', 2), ('f', 2), ('s', 2), ('c', 1), ('v', 1)]
