python实现打印扫描效果详情

import pygame
import random

# 参数
SCREENSIZE=(600,600)
BLACK=(0,0,0,13)
# 初始化
pygame.init()
font = pygame.font.SysFont('宋体', 20)
screen = pygame.display.set_mode(SCREENSIZE)
surface = pygame.Surface(SCREENSIZE, flags=pygame.SRCALPHA)
pygame.Surface.convert(surface)
surface.fill(BLACK)
screen.fill(BLACK)

# 内容
lib=[chr(i) for i in range(48,48+10)] + [chr(i) for i in range(97,97+26)]   # [0-9 a-z]
texts = [font.render(l, True, (0, 255, 0)) for l in lib]
cols = list(range(40))  # 字体15, 窗口600

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            exit()
    pygame.time.delay(33)
    screen.blit(surface, (0, 0))
    for i in range(n:=len(cols)):
        text = random.choice(texts)
        # 字母扫描
        screen.blit(text, (i * 15, cols[i] * 15))
        cols[i] = (cols[i]+1)%40
    pygame.display.flip()

import pygame
import random
# 参数
SCREENSIZE=(600,600)
BLACK=(0,0,0,13)
# 初始化
pygame.init()
font = pygame.font.SysFont('宋体', 20)
screen = pygame.display.set_mode(SCREENSIZE)
surface = pygame.Surface(SCREENSIZE, flags=pygame.SRCALPHA)
pygame.Surface.convert(surface)
surface.fill(BLACK)
screen.fill(BLACK)
# 内容
lib=[chr(i) for i in range(48,48+10)] + [chr(i) for i in range(97,97+26)]   # [0-9 a-z]
texts = [font.render(l, True, (0, 255, 0)) for l in lib]
cols = list(range(40))  # 字体15, 窗口600
while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            exit()
    pygame.time.delay(33)
    screen.blit(surface, (0, 0))
    for i in range(n:=len(cols)):
        text = random.choice(texts)
        # 字母扫描
        screen.blit(text, (i * 15, cols[i] * 15))
        cols[i] = (cols[i]+1)%40
    pygame.display.flip()