Q31: What are key memory-efficient iterator tools in the 'itertools' module?
itertools.chain(*iterables): Combines multiple iterables seamlessly without creating intermediate lists.itertools.islice(iterable, start, stop): Slices iterators lazily.itertools.combinations(iterable, r): Generates $r$-length combinations lazily.
Key Takeaways
- Memory-efficient lazy iteration pipelines.
chainmerges iterables;combinations/permutationshandle combinatorics.
Knowledge Check
Which itertools function merges three separate list generators into a single continuous iterator stream?