Arithmetic Subarrays LeetCode solution in Python

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class Solution:
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    def checkArithmeticSubarrays(
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        self, nums: List[int], l: List[int], r: List[int]
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    ) -> List[bool]:
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        ans = []
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        def find_diffs(arr):
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            arr.sort()
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            dif = []
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            for i in range(len(arr) - 1):
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                dif.append(arr[i] - arr[i + 1])
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            return len(set(dif)) == 1
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        for i, j in zip(l, r):
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            ans.append(find_diffs(nums[i : j + 1]))
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        return ans