Monotonic Array Python Solution with Tests

lcpy gen -n 896   # by problem number
lcpy gen -s monotonic_array   # by problem name

Input: nums = [1,2,2,3]
Output: true

Input: nums = [6,5,4,4]
Output: true

Input: nums = [1,3,2]
Output: false

class Solution:
    # Time: O(n)
    # Space: O(1)
    def is_monotonic(self, nums: list[int]) -> bool:
        increasing = decreasing = True
        for i in range(1, len(nums)):
            increasing &= nums[i - 1] <= nums[i]
            decreasing &= nums[i - 1] >= nums[i]
        return increasing or decreasing