TypeError：'bool'对象不可调用？

Question

我正在使用 python 2.7 和 pygame 尝试制作太空入侵者游戏，但我收到此错误，并说这是线路问题

screen.blit(font.render(str(hits),True(255,255,255)),(400,320))

谁能告诉我这是什么意思以及如何解决它？完整代码是

import pygame, sys, random, time, math
from pygame.locals import *
pygame.init()
clock = pygame.time.Clock()
pygame.display.set_caption("Space Invaders")
screen = pygame.display.set_mode((640,650))
badguy_image = pygame.image.load("images/badguy.png").convert()
badguy_image.set_colorkey((0,0,0))
fighter_image = pygame.image.load("images/fighter.png").convert()
fighter_image.set_colorkey((255,255,255))
GAME_OVER = pygame.image.load("images/gameover.png").convert()
font = pygame.font.Font(None,20)
last_badguy_spawn_time = 0
score = 0
shots = 0
hits = 0
misses = 0

class Badguy:

    def __init__(self):
        self.x = random.randint(0,570)
        self.y = -100
        d=(math.pi/2)*random.random()-(math.pi/4)
        speed = random.randint(2,6)
        self.dx=math.sin(d)*speed
        self.dy=math.cos(d)*speed

    def move(self):            
        self.x += self.dx
        self.y += self.dy

    def bounce(self):
        if self.x < 0 or self.x > 570:
            self.dx *= -1

    def off_screen(self):
        return self.y > 640

    def touching(self,missile):
        return (self.x+35-missile.x)**2+(self.y+22-missile.y)**2 < 1225

    def score(self):
        global score
        score+=100

    def draw(self):
        screen.blit(badguy_image,(self.x,self.y))    

class Fighter:
    def __init__(self):
        self.x = 320

    def move(self):
        if pressed_keys[K_LEFT] and self.x > 0:
            self.x -=3
        if pressed_keys[K_RIGHT] and self.x < 540:
            self.x +=3             

    def fire(self):
        global shots
        shots+=1
        missiles.append(Missile(self.x+50))

    def hit_by(self,badguy):
        return (
                badguy.y > 585 and
                badguy.x > self.x - 55 and
                badguy.x < self.x + 85
                )

    def draw(self):
        screen.blit(fighter_image,(self.x,591))            

class Missile:
    def __init__(self,x):
        self.x = x
        self.y = 591

    def move(self):
        self.y -= 5

    def off_screen(self):
        return self.y < -8

    def draw(self):
        pygame.draw.line(screen,(255,0,0),(self.x,self.y),(self.x,self.y+8),1)

badguys = []
fighter = Fighter()
missiles = []

while 1:
    clock.tick(60)
    for event in pygame.event.get():
        if event.type == QUIT:
            sys.exit()
        if event.type == KEYDOWN and event.key == K_SPACE:
            fighter.fire()
    pressed_keys = pygame.key.get_pressed()

    if time.time() - last_badguy_spawn_time > 0.5:
        badguys.append(Badguy())
        last_badguy_spawn_time = time.time()

    screen.fill((0,0,0))
    fighter.move()
    fighter.draw()

    i = 0
    while i < len(badguys):
        badguys[i].move()
        badguys[i].bounce()
        badguys[i].draw()
        if badguys[i].off_screen():
            del badguys[i]
            i -= 1
        i += 1

    i = 0
    while i < len(missiles):
        missiles[i].move()
        missiles[i].draw()
        if missiles[i].off_screen():
            del missiles[i]
            misses += 1
            i -= 1
        i += 1

    i = 0
    while i < len(badguys):
        j = 0
        while j < len(missiles):
            if badguys[i].touching(missiles[j]):
                badguys[i].score()
                hits += 1
                del badguys[i]
                del missiles[j]
                i -= 1
                break
            j += 1
        i += 1

    screen.blit(font.render("Score: "+str(score),True,(255,255,255)),(5,5))

    for badguy in badguys:
        if fighter.hit_by(badguy):
            screen.blit(GAME_OVER,(170,200))            
            screen.blit(font.render(str(shots),True,(255,255,255)),(266,320))
            screen.blit(font.render(str(score),True,(255,255,255)),(266,348))
            screen.blit(font.render(str(hits),True(255,255,255)),(400,320))
            screen.blit(font.render(str(misses),True,(255,255,255)),(400,377))
            if shots == 0:
                screen.blit(font.render("--",True,(255,255,255)),(400,357))
            else:
                screen.blit(font.render(str((1000*hits/shots)/10.)+"%",True,(255,255,255)),(400,357))            
            while 1:
                for event in pygame.event.get():
                    if event.type == QUIT:
                        sys.exit()
                pygame.display.update()

    pygame.display.update()    

Answer 1

你在True 之后忘记了逗号, - 所以现在你尝试调用函数True()

但是 True 是 bool 对象，而不是函数 - 所以它不是 "callable" - 你会得到错误。