python按键按住不放持续响应的实例代码

import pygame
import time
from pygame.locals import * # 用来检测事件，比如键盘按键操作


class Hero(BasePlane):
  """定义我方飞机类"""
  def __init__(self, screen, enemy_temp):
    BasePlane.__init__(self, 140, 488, screen, "./spritesheets/hero_fly_1.png") # 继承飞机基类，这里不用管
    self.enemy = enemy_temp
     # 设置上下左右四个属性
    self.key_right_status = False
    self.key_left_status = False
    self.key_up_status = False
    self.key_down_status = False

   # 以下方法是控制上下左右移动
  def move(self):
    if self.key_right_status:
      self.x += 3
    if self.key_left_status:
      self.x -= 3
    if self.key_down_status:
      self.y += 3
    if self.key_up_status:
      self.y -= 3
def key_control(hero_temp):
  """控制键盘的函数"""
  for event in pygame.event.get():
    # 判断是否是点击了退出按钮
    if event.type == QUIT:
      print("exit")
      exit()
    # 在按下键盘时，设置hero的属性为True
    elif event.type == KEYDOWN:
      if event.key == K_a or event.key == K_LEFT:
        hero_temp.key_left_status = True 
      elif event.key == K_d or event.key == K_RIGHT:
        hero_temp.key_right_status = True
      elif event.key == K_w or event.key == K_UP:
        hero_temp.key_up_status = True
      elif event.key == K_s or event.key == K_DOWN:
        hero_temp.key_down_status = True
      elif event.key == K_SPACE:
        hero_temp.shoot() # 这里应该是飞机.显示子弹方法（）
    elif event.type == KEYUP:
      if event.key == K_a or event.key == K_LEFT:
        hero_temp.key_left_status = False
        # 检测按键是否是d或者方向键right
      elif event.key == K_d or event.key == K_RIGHT:
        hero_temp.key_right_status = False
      elif event.key == K_w or event.key == K_UP:
        hero_temp.key_up_status = False
      elif event.key == K_s or event.key == K_DOWN:
        hero_temp.key_down_status = False
def main():
  # 1.创建一个窗口，用来显示内容
  screen = pygame.display.set_mode((320, 568), 0, 32)
  # 2.创建一个跟窗口大小一致的图片，用来填充当背景
  background = pygame.image.load("./spritesheets/background_2.png")
  enemy = Enemy(screen)
  hero = Hero(screen, enemy) # 创建我方飞机英雄对象
  while True:
    # 设定需要显示的图在窗口中哪个位置显示
    screen.blit(background, (0, 0))
    # 我方飞机英雄显示
    hero.display()
    # 敌方飞机显示
    enemy.display()
    enemy.move()
    enemy.shoot()
    # 获取事件，比如按键等
    key_control(hero)
    hero.move()
    # 更新需要显示的内容
    pygame.display.update()
    time.sleep(0.01)


if __name__ == '__main__':
  main()