Python参数传递

Question

我正在为我的大学课程制作pong的修改版本，并且在传递某些方法时遇到了一些麻烦。我相信我已经设置了一切，以便能够做一些参数传递。代码运行良好，并停止在我的主函数中的while循环之后工作。任何帮助表示赞赏。

import pygame 

    SCR_WID, SCR_HEI = 640, 480 
    class Player(): 
      def __init__(self): 
        self.x, self.y = 16, SCR_HEI/2 
        self.x1, self.y1 = SCR_WID-16, SCR_HEI/2 
        self.speed = 3 
        self.padWid, self.padHei = 8, 64 
        self.score = 0 
        self.scoreFont = pygame.font.Font("imagine_font.ttf", 64) 

      def scoring(self): 
        scoreBlit = self.scoreFont.render(str(self.score), 1, (0,0,0)) 
        screen.blit(scoreBlit, (32, 16)) 
        if self.score == 10: 
          print ("player 1 wins!") 
          exit() 

      def scoring1(self): 
        scoreBlit = self.scoreFont.render(str(self.score), 1, (0,0,0)) 
        screen.blit(scoreBlit, (SCR_HEI+92, 16)) 
        if self.score == 10: 
          print ("Player 2 wins!") 
          exit() 

      def movement(self):     
        keys = pygame.key.get_pressed() 
        if keys[pygame.K_w]: 
          self.y -= self.speed 
        elif keys[pygame.K_s]: 
          self.y += self.speed 

        if self.y <= 0: 
          self.y = 0 
        elif self.y >= SCR_HEI-64: 
          self.y = SCR_HEI-64 

        keys1 = pygame.key.get_pressed() 
        if keys1[pygame.K_UP]: 
          self.y1 -= self.speed 
        elif keys1[pygame.K_DOWN]: 
          self.y1 += self.speed 

        if self.y1 <= 0: 
          self.y1 = 0 
        elif self.y >= SCR_HEI-64: 
          self.y1 = SCR_HEI-64 

      def draw(self): 
        pygame.draw.rect(screen, (0,0,0), (self.x, self.y, self.padWid, self.padHei)) 
        pygame.draw.rect(screen, (0,0,0), (self.x1, self.y1, self.padWid, self.padHei)) 



    class Ball(): 
      def __init__(self): 
        self.x, self.y = SCR_WID/2, SCR_HEI/2 
        self.x1, self.y1 = SCR_WID/2, SCR_HEI/2 
        self.speed_x = -3 
        self.speed_y = 3 
        self.size = 8 

      def movement(self): 
        self.x += self.speed_x 
        self.y += self.speed_y 

        if self.y <= 0: 
          self.speed_y *= -1 
        elif self.y >= SCR_HEI-self.size: 
          self.speed_y *= -1 

        if self.x <= 0: 
          self.__init__() 
          enemy.score += 1 
        elif self.x >= SCR_WID-self.size: 
          self.__init__() 
          self.speed_x = 3 
          player.score += 1 
        for n in range(-self.size, player.padHei): 
          if self.y == player.y + n: 
            if self.x <= player.x + player.padWid: 
              self.speed_x *= -1 
              break 
          n += 1 
        self.x1 += self.speed_x 
        self.y1 += self.speed_y 

        if self.y1 <= 0: 
          self.speed_y *= -1 
        elif self.y1 >= SCR_HEI-self.size: 
          self.speed_y *= -1 

        if self.x1 <= 0: 
          self.__init__() 
          enemy.score += 1 
        elif self.x1 >= SCR_WID-self.size: 
          self.__init__() 
          self.speed_x = 3 
          player.score += 1 
        for n in range(-self.size, enemy.padHei): 
          if self.y1 == enemy.y1 + n: 
            if self.x1 >= enemy.x1 - enemy.padWid: 
              self.speed_x *= -1 
              break 
          n += 1 

      def draw(self): 
        pygame.draw.rect(screen, (112,138,144), (self.x, self.y, 8, 8)) 

    SCR_WID, SCR_HEI = 640, 480 
    screen = pygame.display.set_mode((SCR_WID, SCR_HEI)) 
    pygame.display.set_caption("Justin's pong") 
    pygame.font.init() 
    clock = pygame.time.Clock() 
    FPS = 60 
    player = Player() 
    ball = Ball() 
    enemy = Player() 

    def main(): 
     while True: 
      for event in pygame.event.get(): 
          if event.type == pygame.QUIT: 
            print ("Game exited by user") 
            exit() 
     backgroundimage = pygame.image.load("background.png") 
     ball.movement() 
     player.movement() 
     enemy.movement() 
     position = (0,0) 
     screen.fill((0, 0, 0)) 
     screen.blit(backgroundimage, position) 
     ball.draw() 
     player.draw() 
     player.scoring() 
     enemy.draw() 
     enemy.scoring1() 
     pygame.display.flip() 
     clock.tick(FPS) 

    main() 

Answer 1

没有超出您的while循环，直到循环完成。

i = 0 
while i < 5: 
    print(i) 
    i += 1 
print('Finished!') 

输出：

0 
1 
2 
3 
4 
Finished!