如何将输入值作为变量存储在Pygame中

import pygame
from pygame.locals import *

pygame.init()

# 创建窗口
screen = pygame.display.set_mode((800, 600))
pygame.display.set_caption("Input Value Demo")

# 初始化变量
input_value = ""

running = True
while running:
    for event in pygame.event.get():
        if event.type == QUIT:
            running = False
        elif event.type == KEYDOWN:
            if event.key == K_RETURN:
                # 处理输入值
                print("输入值为:", input_value)
                input_value = ""
            elif event.key == K_BACKSPACE:
                # 删除最后一个字符
                input_value = input_value[:-1]
            else:
                # 将按键值添加到输入值中
                input_value += event.unicode

    # 渲染文本
    font = pygame.font.Font(None, 36)
    text = font.render("输入值: " + input_value, True, (255, 255, 255))
    screen.blit(text, (10, 10))

    pygame.display.flip()

pygame.quit()