《python編程從入門到實(shí)踐》中在學(xué)習(xí)外星人入侵項(xiàng)目中運(yùn)行程序時(shí)出現(xiàn)報(bào)錯(cuò) AttributeError: 'Event' object has no attribute 'key'

錯(cuò)誤代碼如下：

# coding = utf-8

import sys
import pygame
from settings import Settings
from ship import Ship

class AlienInvasion:
    """管理游戲資源與行為的類"""

    def __init__(self):
        """初始化游戲并創(chuàng)建游戲資源"""
        pygame.init()
        self.settings = Settings()
        self.screen = pygame.display.set_mode((0,0),pygame.FULLSCREEN)
        self.settings.screen_width = self.screen.get_rect().width
        self.settings.screen_height = self.screen.get_rect().height
        pygame.display.set_caption("Alien Invasion")

        self.ship = Ship(self)

    def run_game(self):
        """開始游戲的主循環(huán)"""
        while True:
            self._check_events()
            self.ship.update()
            self._update_screen()

    def _check_events(self):
        """響應(yīng)按鍵和鼠標(biāo)事件"""
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                sys.exit()
            elif event.type == pygame.KEYDOWN:  
                self._check_keydown_events(event)
            elif event.type == pygame.KEYUP:
                self._check_keyup_events(event)‘

            #按Q鍵退出游戲
            elif event.key == pygame.K_q:
                sys.exit()

    def _check_keydown_events(self,event):
        """響應(yīng)按鍵"""
        if event.key == pygame.K_RIGHT:
            self.ship.moving_right = True
        elif event.key == pygame.K_LEFT:
            self.ship.moving_left = True

    def _check_keyup_events(self,event):
        """響應(yīng)松開"""
        if event.key == pygame.K_RIGHT:
            self.ship.moving_right = False
        elif event.key == pygame.K_LEFT:
            self.ship.moving_left = False
    
    def _update_screen(self):
        """更新屏幕上的圖像，并切換到新屏幕"""
        self.screen.fill(self.settings.bg_color)
        self.ship.blitme()

        pygame.display.flip()

if __name__ == "__main__":
    #創(chuàng)建游戲?qū)嵗⑦\(yùn)行游戲
    ai = AlienInvasion()
    ai.run_game()

運(yùn)行錯(cuò)誤提示

C:\Users\魚語(yǔ)雨\Desktop\python\python\alien_invasion>python alien_invasion.py
pygame 2.1.2 (SDL 2.0.18, Python 3.10.2)
Hello from the pygame community. https://www.pygame.org/contribute.html
Traceback (most recent call last):
  File "C:\Users\魚語(yǔ)雨\Desktop\python\python\alien_invasion\alien_invasion.py", line 69, in <module>
    ai.run_game()
  File "C:\Users\魚語(yǔ)雨\Desktop\python\python\alien_invasion\alien_invasion.py", line 25, in run_game
    self._check_events()
  File "C:\Users\魚語(yǔ)雨\Desktop\python\python\alien_invasion\alien_invasion.py", line 39, in _check_events
    elif event.key == pygame.K_q:
AttributeError: 'Event' object has no attribute 'key'

導(dǎo)致錯(cuò)誤的原因?yàn)椤?#按Q鍵退出游戲”這部分程序中“elif event.key == pygame.K_q:”這句語(yǔ)句寫在了與 事件類型 “event.type == pygame.KEYDOWN:” 并列的位置上。

“KEYDOWN”和“KEYUP”作為 鍵盤事件，其提供了一個(gè)成員屬性key，通過該屬性來(lái)獲取本次鍵盤事件的內(nèi)容，及按下了那個(gè)按鍵，所以“event.key”不能與“event.type”處于并列位置。

使用pygame處理事件時(shí)，邏輯一般是先判斷事件類型，然后在根據(jù)不同的事件操作，執(zhí)行不同的游戲操作，及先判斷事件類型，再判斷事件內(nèi)容。

正確代碼如下：文章來(lái)源地址http://www.zghlxwxcb.cn/news/detail-503653.html

# coding = utf-8

import sys
import pygame
from settings import Settings
from ship import Ship

class AlienInvasion:
    """管理游戲資源與行為的類"""

    def __init__(self):
        """初始化游戲并創(chuàng)建游戲資源"""
        pygame.init()
        self.settings = Settings()
        self.screen = pygame.display.set_mode((0,0),pygame.FULLSCREEN)
        self.settings.screen_width = self.screen.get_rect().width
        self.settings.screen_height = self.screen.get_rect().height
        pygame.display.set_caption("Alien Invasion")

        self.ship = Ship(self)

    def run_game(self):
        """開始游戲的主循環(huán)"""
        while True:
            self._check_events()
            self.ship.update()
            self._update_screen()

    def _check_events(self):
        """響應(yīng)按鍵和鼠標(biāo)事件"""
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                sys.exit()
            elif event.type == pygame.KEYDOWN:  
                self._check_keydown_events(event)
            elif event.type == pygame.KEYUP:
                self._check_keyup_events(event)

    def _check_keydown_events(self,event):
        """響應(yīng)按鍵"""
        if event.key == pygame.K_RIGHT:
            self.ship.moving_right = True
        elif event.key == pygame.K_LEFT:
            self.ship.moving_left = True
        #按Q鍵退出游戲
        elif event.key == pygame.K_q:
            sys.exit()

    def _check_keyup_events(self,event):
        """響應(yīng)松開"""
        if event.key == pygame.K_RIGHT:
            self.ship.moving_right = False
        elif event.key == pygame.K_LEFT:
            self.ship.moving_left = False
    
    def _update_screen(self):
        """更新屏幕上的圖像，并切換到新屏幕"""
        self.screen.fill(self.settings.bg_color)
        self.ship.blitme()

        pygame.display.flip()

if __name__ == "__main__":
    #創(chuàng)建游戲?qū)嵗⑦\(yùn)行游戲
    ai = AlienInvasion()
    ai.run_game()