Blockquote，我只是在这段电晕时期开始编码，所以遇到了一个问题。错误代码是evil_icon = [i]NameError：未定义名称'i'
而且我不确定为什么。我一直在网上寻找，但找不到任何答案。希望这已经提供了足够的资源来成为一个足够好的问题。
import pygame
import random
import math
pygame.init()
# game over logo
game_over = pygame.image.load("game-over.png")
# create screen
screen = pygame.display.set_mode((1000, 600))
background = pygame.image.load("8717.jpg")
# Title + Logo
pygame.display.set_caption("Space Invader")
icon = pygame.image.load("chicken.png")
pygame.display.set_icon(icon)
# Player icon
player_icon = pygame.image.load("spaceship.png")
playerX = 400
playerY = 500
player_changeX = 0
player_changeY = 0
# multiple enemy players
enemy_icon = [i]
enemyX = [i]
enemyY = [i]
enemy_changeX = [i]
enemy_changeY = [i]
num_of_enemies = 2
for i in range(num_of_enemies):
enemy_icon.append(pygame.image.load("space-invaders.png"))
enemyX.append(random.randint(0, 936))
enemyY.append(random.randint(-100, -50))
enemy_changeX.append(random.randint(-2, 2))
enemy_changeY.append(random.randint(1, 2))
# bullet #ready you can't see bullet. fire you can
bullet = pygame.image.load("bullet.png")
bulletX = 0
bulletY = 0
bulletY_change = 2
bulletX_change = 0
bullet_state = "ready"
# score
score = 0
def player(x, y):
screen.blit(player_icon, (x, y))
def enemy(x, y, i):
screen.blit(enemy_icon[i], (x, y))
def fire_bullet(x, y):
global bullet_state
bullet_state = "fire"
screen.blit(bullet, (x + 16, y + 10))
def has_collided(enemyX, enemyY, bulletX, bulletY):
distance = math.sqrt((math.pow(enemyX - bulletX, 2)) + (math.pow(enemyY - bulletY, 2)))
if distance < 27:
return True
else:
return False
def collided(enemyX, enemyY, playerX, playerY):
distance2 = math.sqrt((math.pow(enemyX - playerX, 2)) + (math.pow(enemyY - playerY, 2)))
if distance2 < 27:
return True
else:
return False
# game loop
running = True
while running:
# background round colour RGB
screen.fill((0, 0, 0))
# background image
screen.blit(background, (0, 0))
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
# If key pressed check whether its right or left
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
player_changeX = -5
if event.key == pygame.K_RIGHT:
player_changeX = 5
if event.key == pygame.K_UP:
player_changeY = -5
if event.key == pygame.K_DOWN:
player_changeY = 5
# bullet shot
if event.key == pygame.K_SPACE:
if bullet_state == "ready":
bulletX = playerX
bulletY = playerY
fire_bullet(bulletX, bulletY)
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
player_changeX = 0
if event.key == pygame.K_UP or event.key == pygame.K_DOWN:
player_changeY = 0
# If player reaches boarder
if playerX >= 936:
playerX = 20
if playerX <= 0:
playerX = 936
if playerY <= 0:
playerY = 0
if playerY >= 550:
playerY = 550
# enemy control
for i in range(num_of_enemies):
if enemyX[i] >= 936:
enemyX[i] = 20
if enemyX[i] <= 0:
enemyX[i] = 936
if enemyY[i] <= 0:
enemyY[i] = 0
if enemyY[i] >= 550:
enemyY[i] = random.randint(-100, -50)
# collision bullet and enemy
collision = has_collided(enemyX[i], enemyY[i], bulletX, bulletY)
if collision:
bulletY = playerY
bulletX = playerX
bullet_state = "ready"
score += 1
print(score)
enemyX[i] = random.randint(0, 936)
enemyY[i] = random.randint(-100, -50)
enemy_changeX[i] = random.randint(-2, 2)
enemy_changeY[i] = random.randint(1, 2)
collision2 = collided(enemyX[i], enemyY[i], playerX, playerY)
if collision2:
screen.blit(game_over, (400, 100))
score = 0
playerY = 400
playerX = 500
enemy(enemyX[i], enemyY[i], i)
# bullet movement
if bullet_state == "fire":
fire_bullet(bulletX, bulletY)
bulletY -= bulletY_change
if bulletY <= 0:
bullet_state = "ready"
# collision enemy and player
# Player coordinates
playerX += player_changeX
playerY += player_changeY
# enemy change in coordinates
enemyX += enemy_changeX
enemyY += enemy_changeY
# bullet change in y
bulletY -= bulletY_change
# Results
player(playerX, playerY)
pygame.display.update()
错误似乎很明显。您的代码中包含以下行：
# multiple enemy players
enemy_icon = [i]
此行表示您正在尝试创建变量enemy_icon，并将其初始化为包含一个元素的列表。该元素是先前未定义的变量i。我怀疑i是一个错字，并且您实际上是在尝试使用一个空列表进行初始化，在这种情况下，只需像这样删除i：
# multiple enemy players
enemy_icon = []
此后的4个变量同样如此。