我有使用opencv python的形式转换模拟时钟的小时和分钟的数字数据，但我需要它也显示秒。

import cv2
import datetime
import numpy as np

def draw_clock_hand(image, center, angle, length, thickness, color):
    angle = angle * np.pi / 180  # 将角度转换为弧度
    x = int(center[0] + length * np.cos(angle))
    y = int(center[1] + length * np.sin(angle))
    cv2.line(image, center, (x, y), color, thickness)

def draw_clock_numbers(image, center, radius, font_scale, color):
    for i in range(1, 13):
        angle = i * 30 * np.pi / 180  # 每个数字之间相隔30度
        x = int(center[0] + radius * np.cos(angle))
        y = int(center[1] + radius * np.sin(angle))
        cv2.putText(image, str(i), (x, y), cv2.FONT_HERSHEY_SIMPLEX, font_scale, color, 2)

def draw_clock():
    image = np.zeros((500, 500, 3), dtype=np.uint8)  # 创建一个黑色背景的图像
    center = (250, 250)  # 时钟的中心坐标
    radius = 200  # 时钟的半径

    # 获取当前时间
    now = datetime.datetime.now()
    hour = now.hour
    minute = now.minute
    second = now.second

    # 绘制时钟的指针
    draw_clock_hand(image, center, (hour % 12) * 30 + minute * 0.5, int(radius * 0.5), 8, (0, 0, 255))  # 绘制时针
    draw_clock_hand(image, center, minute * 6 + second * 0.1, int(radius * 0.7), 5, (0, 255, 0))  # 绘制分针
    draw_clock_hand(image, center, second * 6, int(radius * 0.9), 2, (255, 0, 0))  # 绘制秒针

    # 绘制时钟的数字
    draw_clock_numbers(image, center, int(radius * 0.8), 1.5, (255, 255, 255))

    cv2.imshow("Clock", image)
    cv2.waitKey(0)
    cv2.destroyAllWindows()

draw_clock()