编写一个基本的程序来寻找一对最近的点，我被卡住了。

class Point:
    def __init__(self, x, y):
        self.x = x
        self.y = y

points = [Point(1, 2), Point(3, 4), Point(5, 6), ...]

import math

def calculate_distance(point1, point2):
    return math.sqrt((point2.x - point1.x)**2 + (point2.y - point1.y)**2)

def find_closest_points(points):
    min_distance = float('inf')
    closest_points = None

    for i in range(len(points)):
        for j in range(i+1, len(points)):
            distance = calculate_distance(points[i], points[j])
            if distance < min_distance:
                min_distance = distance
                closest_points = (points[i], points[j])

    return closest_points

closest = find_closest_points(points)
print("最近的点对是：", closest)