Why doesn't it work?
numbers = [3, 4, 11, 13, 11, 4, 4, 7, 3]
numbers.sort(key=lambda x: numbers.count(x))
print(numbers)
Why is the output still [3, 4, 11, 13, 11, 4, 4, 7, 3]
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azro
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2Also: https://stackoverflow.com/questions/25815377/sort-list-by-frequency – luk2302 May 29 '22 at 09:24
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`list.sort` does it inplace, so you can't relate on it for sorting so `numbers = sorted(numbers, key=lambda x: numbers.count(x))` works or copy the list `cc = list(numbers) numbers.sort(key=lambda x: cc.count(x))` – azro May 29 '22 at 09:42