Monotonic Array LeetCode solution in Python

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class Solution:
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    def isMonotonic(self, nums: List[int]) -> bool:
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        counter = 0
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        for i in range(len(nums) - 1):
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            if nums[i] >= nums[i + 1]:
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                counter += 1
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        if counter == len(nums) - 1:
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            return True
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        counter = 0
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        for i in range(len(nums) - 1):
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            if nums[i] <= nums[i + 1]:
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                counter += 1
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        if counter == len(nums) - 1:
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            return True
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        return False