<h2 class="my-2 font-semibold text-xl">namedtuple</h2>A class template to generated memory efficient class.<pre class="text-sm bg-gray-100 my-4 p-2 overflow-x-auto"><code>MyClass = namedtuple(&#x27;MyClass&#x27;, [attrib_foo, attrib_bar, ...])</code></pre>Keys and items of a dict can be used as a set.<h2 class="my-2 font-semibold text-xl">deque</h2><code class="px-1 bg-gray-100 border-2 rounded">deque</code> is implemented as a double-ended queue, it can be created with <code class="px-1 bg-gray-100 border-2 rounded">maxlen=N</code><pre class="text-sm bg-gray-100 my-4 p-2 overflow-x-auto"><code>methods: appendleft, popleft, append, pop</code></pre><h2 class="my-2 font-semibold text-xl">defaultdict</h2><pre class="text-sm bg-gray-100 my-4 p-2 overflow-x-auto"><code>multidict = defaultdict(list) # builds a multidict using list
multidict = defaultdict(set) # builds a multidict using set</code></pre><h2 class="my-2 font-semibold text-xl">Counter</h2><pre class="text-sm bg-gray-100 my-4 p-2 overflow-x-auto"><code>words_count = Counter(words)

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

counter even supports +/-</code></pre>

$ ls ~yifei/notes/

Python 标准库中的容器

namedtuple

deque

defaultdict

Counter