Top $k$ Frequent Elements

• leetcode.com/problems/top-k-frequent-elements/

Solutions

• Use Counter to count frequency, then sort based on value.

frequency = Counter(nums)
items_sorted = sorted(frequency.items(), key=lambda x:x[1], reverse=True)
return [item[0] for item in items_sorted[:k]]

Alternatively, use builtin method

return [num for num, _ in counter.most_common(k)]