从集群中返回面积最大的圆

import math

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

def calculate_area(circle):
    return math.pi * circle.radius ** 2

def find_largest_circle(cluster):
    max_area = 0
    max_index = -1

    for i, circle in enumerate(cluster):
        area = calculate_area(circle)
        if area > max_area:
            max_area = area
            max_index = i

    if max_index != -1:
        return cluster[max_index]
    else:
        return None

# 创建一个集群
cluster = [
    Circle(0, 0, 5),
    Circle(2, 3, 10),
    Circle(-1, -1, 7),
    Circle(4, 4, 3)
]

# 找到面积最大的圆
largest_circle = find_largest_circle(cluster)

if largest_circle is not None:
    print("面积最大的圆的圆心坐标为({}, {})，半径为{}，面积为{}".format(
        largest_circle.x, largest_circle.y, largest_circle.radius, calculate_area(largest_circle)))
else:
    print("集群为空，无法找到面积最大的圆")