python小程序，45行代码实现可切换版代码雨（附源码）

import random, pygame

PANEL_width = 1000
PANEL_highly = 1000
FONT_PX = 15
pygame.init()
# 创建一个窗口
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))
'''
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'''
# 改变 '' 内的数字或者字母就行了
letter = ['1', '2', '3', '4', '5', '6', '7', '8', '9', '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可以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)
    # 重新编辑图像
    winSur.blit(bg_suface, (0, 0))
    for i in range(len(drops)):
        text = random.choice(texts)
        # 重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()