def bin_search(array, value):    """二分查找"""    left = 0    right = len(array) - 1    while left <= right:        middle = (left + right) // 2        if array[middle] > value:            right -= 1        elif array[middle] < value:            left += 1        else:            return middle    return Nonearray = [1, 2, 3, 4, 5, 6]result = bin_search(array, 6)print(result)