$ ls ~yifei/notes/

Python 标准库中的容器

Posted on:

Last modified:

namedtuple

a class template to generated memory efficient class

MyClass = namedtuple('MyClass', [attrib_foo, attrib_bar, ...])

keys and items of a dict can be used as a set.

deque

deque is implemented as deque, it can be created with maxlen=N

appendleft, popleft, append, pop

defaultdict

multidict = defaultdict(list) # builds a multidict using list multidict = defaultdict(set) # builds a multidict using set

OrderedDict

it perserves the order as insertion, implemented with a linked list

Counter

words_count = Counter(words)

Counter.most_common(N) returns tuple Counter.update(more) add more words

counter even supports +/-

© 2016-2022 Yifei Kong. Powered by ynotes

All contents are under the CC-BY-NC-SA license, if not otherwise specified.

Opinions expressed here are solely my own and do not express the views or opinions of my employer.