说起电影《黑客帝国》,置信大部分人都看过或据说过,影片中有一个场景数字雨,如果你看过电影的话,应该对这个经典场景印象粗浅,本文咱们利用 Python 以数字、字母、图片三种模式来实现这一成果。

1. 数字

首先,咱们来实现数字雨,咱们须要创立一个窗口来显示内容,窗口的创立应用 pygame 库,代码实现如下:

FONT_PX = 15pygame.init()winSur = pygame.display.set_mode((500, 600))font = pygame.font.SysFont('fangsong', 20)bg_suface = pygame.Surface((500, 600), flags=pygame.SRCALPHA)pygame.Surface.convert(bg_suface)bg_suface.fill(pygame.Color(0, 0, 0, 13))winSur.fill((0, 0, 0))# 数字texts = [font.render(str(i), True, (0, 255, 0)) for i in range(10)]colums = int(500 / FONT_PX)drops = [0 for i in range(colums)]while True:    for event in pygame.event.get():        if event.type == pygame.QUIT:            exit()    pygame.time.delay(33)    winSur.blit(bg_suface, (0, 0))    for i in range(len(drops)):        text = random.choice(texts)        winSur.blit(text, (i * FONT_PX, drops[i] * FONT_PX))        drops[i] += 1        if drops[i] * 10 > 600 or random.random() > 0.95:            drops[i] = 0    pygame.display.flip()

实现成果如下:

2. 字母

接着,咱们再来实现字母雨,实现形式根本就是将下面实现数字雨的数字换成字母,代码实现如下:

PANEL_width = 400PANEL_highly = 500FONT_PX = 15pygame.init()# 创立一个窗口winSur = pygame.display.set_mode((PANEL_width, PANEL_highly))font = pygame.font.SysFont('123.ttf', 22)bg_suface = pygame.Surface((PANEL_width, PANEL_highly), flags=pygame.SRCALPHA)pygame.Surface.convert(bg_suface)bg_suface.fill(pygame.Color(0, 0, 0, 28))winSur.fill((0, 0, 0))letter = ['q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', 'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', 'z', 'x', 'c',          'v', 'b', 'n', 'm']texts = [    font.render(str(letter[i]), True, (0, 255, 0)) for i in range(26)]# 按窗口的宽度来计算能够在画板上放几列坐标并生成一个列表column = int(PANEL_width / FONT_PX)drops = [0 for i in range(column)]while True:    # 从队列中获取事件    for event in pygame.event.get():        if event.type == pygame.QUIT:            exit()        elif event.type == pygame.KEYDOWN:            chang = pygame.key.get_pressed()            if (chang[32]):                exit()    # 暂停给定的毫秒数    pygame.time.delay(30)    # 从新编辑图像    winSur.blit(bg_suface, (0, 0))    for i in range(len(drops)):        text = random.choice(texts)        # 从新编辑每个坐标点的图像        winSur.blit(text, (i * FONT_PX, drops[i] * FONT_PX))        drops[i] += 1        if drops[i] * 10 > PANEL_highly or random.random() > 0.95:            drops[i] = 0    pygame.display.flip()

实现成果如下:

3. 图片

最初,咱们应用图片来实现这一成果,图片咱们就应用雨滴吧,这里咱们应用 tkinter 创立窗口,代码实现如下:

# 初始雨滴纵坐标INIT_HEIGHT = 10# 雨滴创立def rainmake(canvas, imagefile):    rainlist = []    for i in range(5):        # 依据图片,创立一排雨滴        rainlist.append(canvas.create_image(100 + 80 * i, INIT_HEIGHT, anchor=NE, image=imagefile))    return rainlist# 雨滴着落def raindown(tk, canvas, imagefile, sec):    # 线程间期待    time.sleep(sec)    rainlist = rainmake(canvas, imagefile)    # 每个雨滴的纵坐标值    height = [INIT_HEIGHT] * 10    while True:        # 每次挪动前稍等一会        time.sleep(0.2)        # 5 个雨滴一起挪动        for i in range(5):            # 如果雨滴字到底了,则不继续移动            if not height[i] == 0:                # 设置着落步调                rnd = random.randint(5, 50)                canvas.move(rainlist[i], 0, rnd)                height[i] = height[i] + rnd                tk.update()        for i,h in enumerate(height):            if h > 400:                # 当雨滴字走到最下方,则删除                canvas.delete(rainlist[i])                tk.update()                # 清空该雨滴的 height                height[i] = 0                print(i,h,height)        # 全到底,则跳出循环        if height == [0] * 5:            print('break:',threading.current_thread().name)            breakdef lookloop(tk, canvas, thread):    aliveflg = False    while True:        # 5s 检测一次        time.sleep(5)        for th in thread:            if th.is_alive():                aliveflg = True            else:                aliveflg = False        if aliveflg == False:            break    canvas.create_text(100 , 200, text='雨停了...', fill='red')    canvas.pack()    time.sleep(5)    tk.destroy()

实现成果如下:

源码在公众号 Python小二 后盾回复 200513 获取。