Untitled

class Solution(object):
    def search(self, nums, target):
        """
        :type nums: List[int]
        :type target: int
        :rtype: int
        """
        start = 0 
        end = len(nums) - 1
        while start <= end:
            middle = (start + end)//2
            middlepoint = nums[middle]
            if middlepoint == target:
                return nums.index(middlepoint)
            elif middlepoint > target:
                end = middle - 1
            elif middlepoint < target:
                start = middle + 1
            else:
                return -1