24 lines
562 B
Python
24 lines
562 B
Python
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##################################### Первый способ:
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A = [10, 10, 23, 10, 123, 66, 78, 123]
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counter = {}
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for elem in A:
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counter[elem] = counter.get(elem, 0) + 1
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doubles = {element: count for element, count in counter.items() if count > 1}
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print(doubles)
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##################################### Второй способ:
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from collections import Counter
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counter = Counter(A)
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##################################### Третий способ:
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from collections import defaultdict
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counter = defaultdict(int)
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for elem in A:
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counter[elem] += 1
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