162FindPeakElement.py

class Solution(object):
    def findPeakElement(self, nums):
        """
        :type nums: List[int]
        :rtype: int
        """
        low, high = 0, len(nums)-1

        while low < high:
            mid = (low + high) / 2
            if nums[mid] < nums[mid+1]:
                low = mid + 1
            else:
                high = mid
        return low