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What useful types does the collections module provide?

Q: What useful types does the collections module provide?

**defaultdict** (auto-initializes missing keys), **Counter** (counts hashables), **deque** (O(1) ends, good for queues), **namedtuple** (lightweight immutable records), and **OrderedDict**. They cover common patterns more cleanly than raw dicts/lists.

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Explain collections.

collections

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defaultdict (auto-initializes missing keys), Counter (counts hashables), deque (O(1) ends, good for queues), namedtuple (lightweight immutable records), and OrderedDict. They cover common patterns more cleanly than raw dicts/lists.

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PYCounter, defaultdict grouping, and a bounded deque

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