飞机大战-我机是否被击中（7）

编写飞机大战，完成我机是否被击中功能。完成后相关代码如下：
import pygame
from pygame.locals import *
import time
import random

class HeroPlane:

def __init__(self, scree):
    self.x = 190
    self.y = 576
    self.scree = scree
    self.image = pygame.image.load("./feiji/hero1.png")
    self.bullet_list = []

def display(self):
    self.scree.blit(self.image, (self.x, self.y))

    for bullet in self.bullet_list:
        bullet.display()
        bullet.move()

        if bullet.judge():
            self.bullet_list.remove(bullet)

def move_left(self):
    self.x -= 5

def move_right(self):
    self.x += 5

def fire(self):
    self.bullet_list.append(Bullet(self.scree, self.x, self.y))

# 判断我方战机是否被击中 参数: 敌方战机所有发射的有效子弹列表
def is_hit(self, bullet_list):
    for bullet in bullet_list:
        if self.x < bullet.x < self.x + 100 and self.y < bullet.y < self.y + 124:
            return True
    return False

class Bullet:

def __init__(self, scree, x, y):
    self.x = x + 40
    self.y = y - 22
    self.scree = scree
    self.image = pygame.image.load("./feiji/bullet.png")

def display(self):
    self.scree.blit(self.image, (self.x, self.y))

def move(self):
    self.y -= 20

def judge(self):
    if self.y < 0:
        return True
    else:
        return False

class EnemyPlane:

def __init__(self, scree):
    self.x = 0
    self.y = 0
    self.scree = scree
    self.image = pygame.image.load("./feiji/enemy0.png")
    self.bullet_list = []
    self.direction = "right"

def display(self):
    self.scree.blit(self.image, (self.x, self.y))

    for bullet in self.bullet_list:
        bullet.display()
        bullet.move()

        if bullet.judge():
            self.bullet_list.remove(bullet)

def move(self):
    if self.direction == "right":
        self.x += 5
    elif self.direction == "left":
        self.x -= 5

    if self.x >= 480 - 50:
        self.direction = "left"
    if self.x <= 0:
        self.direction = "right"

def fire(self):
    ran_num = random.randint(1, 100)
    if ran_num == 50 or ran_num == 30:
        self.bullet_list.append(EnemyBullet(self.scree, self.x, self.y))

class EnemyBullet:

def __init__(self, scree, x, y):
    self.x = x + 25
    self.y = y + 40
    self.scree = scree
    self.image = pygame.image.load("./feiji/bullet1.png")

def display(self):
    self.scree.blit(self.image, (self.x, self.y))

def move(self):
    self.y += 20

def judge(self):
    if self.y > 700:
        return True
    else:
        return False

def key_control(hero):
for event in pygame.event.get():
if event.type == QUIT:
print("exit")
exit()

    elif event.type == KEYDOWN:
        if event.key == K_a or event.key == K_LEFT:
            print('left')
            hero.move_left()

        elif event.key == K_d or event.key == K_RIGHT:
            print('right')
            hero.move_right()

        elif event.key == K_SPACE:
            print('space')
            hero.fire()

def main():
scree = pygame.display.set_mode((480, 700), 0, 32)
background = pygame.image.load("./feiji/background.png")
hero = HeroPlane(scree)
enemy = EnemyPlane(scree)
while True:
scree.blit(background, (0, 0))
hero.display()
enemy.display()
enemy.move()
enemy.fire()

    # 调用我方战机的实例方法,判断是否被击中,参数为敌机所有有效子弹列表
    if hero.is_hit(enemy.bullet_list):
        # 被击中
        a += 1
        if a == 5:
            hero.image = pygame.image.load(r".\feiji\hero_blowup_n1.png")
        if a == 10:
            hero.image = pygame.image.load(r".\feiji\hero_blowup_n2.png")
        if a == 15:
            hero.image = pygame.image.load(r".\feiji\hero_blowup_n3.png")
        if a == 20:
            hero.image = pygame.image.load(r".\feiji\hero_blowup_n4.png")

    key_control(hero)

    # 更新需要显示的内容
    pygame.display.update()
    time.sleep(0.05)

if name == 'main':
main()