如何根据指向的值对双指针数组进行排序？

def sort_double_pointer_array(arr):
    n = len(arr)
    for i in range(n):
        for j in range(0, n-i-1):
            if arr[j][1] > arr[j+1][1]:
                arr[j], arr[j+1] = arr[j+1], arr[j]

# 示例
arr = [(1, 4), (2, 2), (3, 3), (4, 1)]
sort_double_pointer_array(arr)
print(arr)  # 输出：[(4, 1), (2, 2), (3, 3), (1, 4)]