我有一个列表，包含enemy类，我已经使用for循环和enemy类中的一个名为move()的函数让它们跟随玩家。
但是当有多个敌人时，它们在跟随玩家时会变得混乱，因此我决定在for循环中添加以下内容：
for enmy in enemies: pygame.draw.circle(screen, (255,0,0), (enmy.x-enmy.rad,enmy.y-enmy.rad), enmy.rad, 0) for enmy2 in enemies: if enmy2 is not enmy: if not enmy.rect.colliderect(enmy2.rect): enmy.move()enmy.rect=pygame.Rect(enmy.x-enmy.rad*2,enmy.y-enmy.rad*2,enmy.rad*2,enmy.rad*2)pygame.draw.rect(screen, (0,0,255), enmy.rect, 2)所以我希望这能测试列表中除了自身之外的每个实例，但当对象独自存在时它不会移动！（而且如果有两个，它们会碰撞然后就停止）
这是完整的代码（不需要额外的文件 c:）
import pygamefrom random import randintfrom pygame.locals import *pygame.init()screen=pygame.display.set_mode((640,480))clock=pygame.time.Clock()px=35py=35prect=pygame.Rect(px-10,py-10,20,20)class Enemy(object): def __init__(self,x,y): self.x=x self.y=y self.rad=randint(5,10) self.rect=pygame.Rect(0,0,0,0) def move(self): if self.x>px: self.x-=1 if self.y<py: self.y+=1 if self.x<px: self.x+=1 if self.y>py: self.y-=1enemies=[Enemy(90,80),Enemy(100,100)]while True: screen.fill((200,230,200)) key=pygame.key.get_pressed() if key[K_UP]: py-=2 if key[K_DOWN]: py+=2 if key[K_RIGHT]: px+=2 if key[K_LEFT]: px-=2 for e in pygame.event.get(): if e.type==QUIT: exit() for enmy in enemies: pygame.draw.circle(screen, (255,0,0), (enmy.x-enmy.rad,enmy.y-enmy.rad), enmy.rad, 0) for enmy2 in enemies: if enmy2 is not enmy: if not enmy.rect.colliderect(enmy2.rect): enmy.move() enmy.rect=pygame.Rect(enmy.x-enmy.rad*2,enmy.y-enmy.rad*2,enmy.rad*2,enmy.rad*2) pygame.draw.rect(screen, (0,0,255), enmy.rect, 2) prect=pygame.Rect(px-20,py-20,20,20) pygame.draw.circle(screen, (0,0,255), (px-10,py-10), 10, 0) pygame.draw.rect(screen, (255,0,0), prect, 2) clock.tick(80) pygame.display.flip()请有人帮帮我！
回答：
经过一番深思熟虑和摆弄（也玩了一会），我设法做了以下事情…
import pygameimport randomfrom pygame.locals import *pygame.init()screen=pygame.display.set_mode((640,480))clock=pygame.time.Clock()px=35py=35prect=pygame.Rect(px-10,py-10,20,20)class Enemy(object): def __init__(self,x,y): self.x=x self.y=y self.rad=random.randint(5,10) self.rect=pygame.Rect(0,0,0,0) self.x_dir = random.choice(('left','right')) self.y_dir = random.choice(('up','down')) def move(self, mode='chase'): if mode=='chase': if self.x>px: self.x-=1 elif self.x<px: self.x+=1 if self.y<py: self.y+=1 elif self.y>py: self.y-=1 else: # roam around # Move for x direction if self.x_dir == 'left': if self.x > 1: self.x -= 1 else: self.x_dir = 'right' self.x += 1 else: if self.x < px - 1: self.x += 1 else: self.x_dir = 'left' self.x -= 1 # Now move for y direction if self.y_dir == 'up': if self.y > 1: self.y -= 1 else: self.y_dir = 'down' self.y += 1 else: if self.y < py - 1: self.y += 1 else: self.y_dir = 'up' self.y -= 1enemies=[Enemy(50,60),Enemy(200,100), Enemy(200,400), Enemy(200,200), Enemy(200,400), Enemy(200,200)]roam = {} # Dict to track relative roam/chaseroam_count = {} # Dict to track time for which roamingmax_roam = {}max_chasing = len(enemies) // 3cur_chasing = 0for i, enmy in enumerate(enemies): if cur_chasing < max_chasing: roam[i] = 'chase' cur_chasing += 1 else: roam[i] = 'roam' roam_count[i] = 0 max_roam[i] = random.randint(100, 500)while True: screen.fill((200,230,200)) key=pygame.key.get_pressed() if key[K_UP]: py-=2 if key[K_DOWN]: py+=2 if key[K_RIGHT]: px+=2 if key[K_LEFT]: px-=2 for e in pygame.event.get(): if e.type==QUIT: exit() prect=pygame.Rect(px-20,py-20,20,20) for e_1, enmy in enumerate(enemies): pygame.draw.circle(screen, (255,0,0), (enmy.x-enmy.rad,enmy.y-enmy.rad), enmy.rad, 0) moved_once = False for e_2, enmy2 in enumerate(enemies): if enmy2 is not enmy: if enmy.rect.colliderect(enmy2.rect): if roam[e_2] == roam[e_1] == 'roam': if cur_chasing < max_chasing: roam[e_1] = 'chase' elif roam[e_2] == roam[e_1] == 'chase': roam[e_2] = 'roam' cur_chasing -= 1 if roam[e_1] == 'roam': roam_count[e_1] += 1 enmy.move('roam') if roam_count[e_1] > max_roam[e_1]: roam_count[e_1] = 0 if cur_chasing < max_chasing: roam[e_1] = 'chase' else: enmy.move('chase') else: if not moved_once: if roam[e_1] == 'roam': roam_count[e_1] += 1 enmy.move('roam') if roam_count[e_1] > max_roam[e_1]: roam_count[e_1] = 0 if cur_chasing < max_chasing: roam[e_1] = 'chase' else: enmy.move('chase') moved_once = True enmy.rect=pygame.Rect(enmy.x-enmy.rad*2,enmy.y-enmy.rad*2,enmy.rad*2,enmy.rad*2) pygame.draw.rect(screen, (0,0,255), enmy.rect, 2) pygame.draw.circle(screen, (0,0,255), (px-10,py-10), 10, 0) pygame.draw.rect(screen, (255,0,0), prect, 2) clock.tick(80) pygame.display.flip()我在多处添加了注释。希望你能理解大意，并从中获得一些灵感。
