要使用Python绘制蔡徐坤打篮球，你可以使用Python的pygame库来实现。以下是一个示例代码，演示如何使用pygame库绘制一个简单的蔡徐坤打篮球的动画效果。

import pygame

# 初始化pygame
pygame.init()

# 设置画布大小和标题
WIDTH, HEIGHT = 800, 600
win = pygame.display.set_mode((WIDTH, HEIGHT))
pygame.display.set_caption("Cai Xukun Basketball")

# 加载蔡徐坤和篮球的图片
player_img = pygame.image.load("caixukun.png")
ball_img = pygame.image.load("basketball.png")
player_img = pygame.transform.scale(player_img, (100, 100))
ball_img = pygame.transform.scale(ball_img, (50, 50))

# 设置蔡徐坤的初始位置和速度
player_x, player_y = 350, 500
player_speed = 5

# 设置篮球的初始位置和速度
ball_x, ball_y = 375, 450
ball_speed = 2
ball_direction = "up"

# 游戏主循环
running = True
while running:
    # 检测游戏退出事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    # 检测键盘输入
    keys = pygame.key.get_pressed()
    if keys[pygame.K_LEFT]:
        player_x -= player_speed
    if keys[pygame.K_RIGHT]:
        player_x += player_speed

    # 移动篮球
    if ball_direction == "up":
        ball_y -= ball_speed
        if ball_y <= 0:
            ball_direction = "down"
    elif ball_direction == "down":
        ball_y += ball_speed
        if ball_y >= HEIGHT - 50:
            ball_direction = "up"

    # 清空画布
    win.fill((255, 255, 255))

    # 绘制蔡徐坤和篮球
    win.blit(player_img, (player_x, player_y))
    win.blit(ball_img, (ball_x, ball_y))

    # 更新画布
    pygame.display.update()

# 退出游戏
pygame.quit()

运行此代码需要在同级目录下放置caixukun.png和basketball.png两个图片文件，分别是蔡徐坤的图片和篮球的图片。你可以根据需要调整图片的位置和大小。使用左右方向键来移动蔡徐坤，篮球会在画布上上下移动。请确保已安装pygame库并导入才能运行此代码。