Web Reference: 1 day ago · itertools — Functions creating iterators for efficient looping ¶ This module implements a number of iterator building blocks inspired by constructs from APL, Haskell, and SML. Jul 12, 2025 · The permutations () function in Python, part of the itertools module, generates all possible ordered arrangements of a given iterable (like a list, string, or tuple). Unlike combinations, where order doesn't matter, permutations consider the order of elements. Dec 12, 2022 · As for your solution, it's usually a good idea to use list (or set) comprehension and to avoid explicit for loops. This is usually considered more Pythonic, and can often be more efficient. So we could just do: def permutations(s: str) -> list: return list({''.join(p) for p in itertools.permutations(s)}) Good answer!
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