Divide Array Into Equal Pairs LeetCode solution in Python

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# Runtime: 213 ms (Top 19.18%) | Memory: 14.1 MB (Top 63.60%)
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class Solution:
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    def divideArray(self, nums: List[int]) -> bool:
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        lena = len(nums)
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        count = sum(num // 2 for num in Counter(nums).values())
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        return lena / 2 == count