如何测试一个矩形是否在另一个矩形中？

def is_rectangle_inside(rect1, rect2):
    # rect1和rect2是两个矩形，每个矩形由左上角和右下角坐标表示
    x1, y1, x2, y2 = rect1
    x3, y3, x4, y4 = rect2

    # 检查边界
    if x1 >= x3 and x2 <= x4 and y1 >= y3 and y2 <= y4:
        return True

    # 检查顶点
    if (x1, y1) in rect2 and (x2, y1) in rect2 and (x1, y2) in rect2 and (x2, y2) in rect2:
        return True

    return False

# 示例使用
rect1 = (1, 1, 4, 4)
rect2 = (2, 2, 3, 3)
print(is_rectangle_inside(rect1, rect2))  # 输出：True

rect3 = (5, 5, 6, 6)
print(is_rectangle_inside(rect1, rect3))  # 输出：False