Python:查找二维数组中元素半径内的点的平均值

import math

def calculate_distance(point1, point2):
    x1, y1 = point1
    x2, y2 = point2
    distance = math.sqrt((x2 - x1)**2 + (y2 - y1)**2)
    return distance

def find_average_within_radius(arr, center, radius):
    total = 0
    count = 0
    for point in arr:
        if calculate_distance(point, center) <= radius:
            total += point
            count += 1
    if count > 0:
        average = total / count
        return average
    else:
        return None

array = [[1, 2], [3, 4], [5, 6], [7, 8]]
center_point = [3, 4]
radius = 2

average = find_average_within_radius(array, center_point, radius)
print("半径内的点的平均值为:", average)