如何计算距离，并以最短距离返回特定变量的值？

import math

# 定义参考点和对应的变量值
reference_points = {
    "point1": {"x": 1, "y": 2, "value": 10},
    "point2": {"x": 3, "y": 4, "value": 20},
    "point3": {"x": 5, "y": 6, "value": 30}
}

# 定义需要计算距离的变量
target_variable = {"x": 7, "y": 8}

# 初始化最短距离和对应的变量值
shortest_distance = math.inf
shortest_distance_variable = None

# 计算距离并找到最短距离对应的变量值
for point, values in reference_points.items():
    distance = math.sqrt((target_variable["x"] - values["x"])**2 + (target_variable["y"] - values["y"])**2)
    if distance < shortest_distance:
        shortest_distance = distance
        shortest_distance_variable = values["value"]

# 返回最短距离对应的特定变量的值
print("最短距离对应的特定变量的值为:", shortest_distance_variable)