如何将这个随机的图像拾取器函数转换为拼接所选图像的函数？

import random
import cv2

def random_image_picker(image_list):
    selected_image = random.choice(image_list)
    return selected_image

def concatenate_images(selected_image, target_image):
    selected_image = cv2.imread(selected_image)
    target_image = cv2.imread(target_image)

    # 调整所选图像的大小和位置
    # 这里使用了简单的示例代码，实际应根据需求进行调整
    selected_image = cv2.resize(selected_image, (100, 100))
    target_image[0:100, 0:100] = selected_image

    cv2.imwrite("concatenated_image.jpg", target_image)

# 示例用法
image_list = ["image1.jpg", "image2.jpg", "image3.jpg"]
target_image = "target_image.jpg"

selected_image = random_image_picker(image_list)
concatenate_images(selected_image, target_image)