Python 解析错误和不正确的坐标

我在《海龟》中创作的游戏遇到了麻烦。每当我尝试运行该程序时，都会出现回溯错误：

ParseError:main.py的第69行输入错误。但是早些时候（当错误没有发生时），我的坐标没有正常工作。我想我输入的是正确的，但不起作用。在游戏中，你需要击中水果。因此，游戏主要是这样的：如果你错过了水果，你的分数将减少一分，你的生活将减少一颗心。首先，它会检查您的分数是否为0。如果你吃了水果，你应该得到+1分。但不幸的是，如果我在窗口左侧的任何地方投篮，我会得到+1分。不管距离有多远

我怀疑问题所在的代码是：

def cannon_shooting():
  bullet1 = random.randint(1, 4)
  global live_score
  if live_score >= 100:
    bullet1 = 5
  if bullet1 == 1:
    bullet.color('black')
  if bullet1 == 2:
    bullet.color('green')
  if bullet1 == 3:
    bullet.color('red')
  if bullet1 == 4:
    bullet.color('grey')
  if bullet1 == 5:
    bullet.color('white')
  bullet.goto(cannon_x, -30)
  bullet.showturtle()
  bullet.goto(cannon_x, 130)
  if bullet.ycor() == enemy.ycor() - 10:
    if not bullet.xcor() == enemy.xcor() - 10:
      if live_score == 0:
        if live_score == 100:
          score.color('white')
        live_score = 0
        score.clear()
        if live_score >= 0:
          score.write("Your score: %s" % live_score, font=(None, 11, "bold"))
      else:
        if live_score == 100:
          score.color('white')
        live_score = live_score - 1
        score.clear()
        if live_score >= 0:
          score.write("Your score: %s" % live_score, font=(None, 11, "bold"))
      move_speed = random.randint(1, 10)
      lives = lives - 1
    if bullet.xcor() = enemy.xcor() - 10:
      if live_score == 100:
        score.color('white')
      live_score = live_score + 1
      score.clear()
      if live_score >= 0:
        score.write("Your score: %s" % live_score, font=(None, 11, "bold"))
      enemy1 = random.randint(1, 3)
      move_speed = random.randint(1, 10)
  if live_score == 100:
    score.clear()
    cannon.goto(0, -100)
    cannon.hideturtle()
    enemy.hideturtle()
    bullet.hideturtle()
    bullet.goto(0, -30)
    win.color('green')
    win.write("Congratulations!", font=(None, 20, "bold"))
    win.goto(-140, -40)
    win.write("You scored 100 points!", font=(None, 20, "bold"))
  if lives == 0:
    score.clear()
    cannon.goto(0, -100)
    cannon.hideturtle()
    enemy.hideturtle()
    bullet.hideturtle()
    bullet.goto(0, -30)
    game_over.color('red')
    game_over.write("Game Over", font=(None, 20, "bold"))
    game_over.goto(-140, -40)
    game_over.write("You scored %d points!" % live_score, font=(None, 20, "bold"))
  bullet.hideturtle()

全部代码：

import random
import turtle

#images
image_coconut = "Coconut.png"
image_banana = "Banana.png"
image_pineapple = "Pineapple.png"
image_cannon = "Cannon.png"

#definitions
live_score = 0
screen = turtle.Screen()
wn = turtle.Screen()
cannon = turtle.Turtle()
enemy = turtle.Turtle()
score = turtle.Turtle()
score1 = turtle.Turtle()
background = turtle.Turtle()
reset = turtle.Turtle()
bullet = turtle.Turtle()
overlay = turtle.Turtle()
enemy_x = enemy.xcor()
enemy_y = enemy.ycor()
win = turtle.Turtle()
game_over = turtle.Turtle()
lives = 3
cannon_x = 0
cannon_x
move_speed = 2
enemy1 = 0
score_goto = 0

def cannon_shooting():
  bullet1 = random.randint(1, 4)
  global live_score
  if live_score >= 100:
    bullet1 = 5
  if bullet1 == 1:
    bullet.color('black')
  if bullet1 == 2:
    bullet.color('green')
  if bullet1 == 3:
    bullet.color('red')
  if bullet1 == 4:
    bullet.color('grey')
  if bullet1 == 5:
    bullet.color('white')
  bullet.goto(cannon_x, -30)
  bullet.showturtle()
  bullet.goto(cannon_x, 130)
  if bullet.ycor() == enemy.ycor() - 10:
    if not bullet.xcor() == enemy.xcor() - 10:
      if live_score == 0:
        if live_score == 100:
          score.color('white')
        live_score = 0
        score.clear()
        if live_score >= 0:
          score.write("Your score: %s" % live_score, font=(None, 11, "bold"))
      else:
        if live_score == 100:
          score.color('white')
        live_score = live_score - 1
        score.clear()
        if live_score >= 0:
          score.write("Your score: %s" % live_score, font=(None, 11, "bold"))
      move_speed = random.randint(1, 10)
      lives = lives - 1
    if bullet.xcor() = enemy.xcor() - 10:
      if live_score == 100:
        score.color('white')
      live_score = live_score + 1
      score.clear()
      if live_score >= 0:
        score.write("Your score: %s" % live_score, font=(None, 11, "bold"))
      enemy1 = random.randint(1, 3)
      move_speed = random.randint(1, 10)
  if live_score == 100:
    score.clear()
    cannon.goto(0, -100)
    cannon.hideturtle()
    enemy.hideturtle()
    bullet.hideturtle()
    bullet.goto(0, -30)
    win.color('green')
    win.write("Congratulations!", font=(None, 20, "bold"))
    win.goto(-140, -40)
    win.write("You scored 100 points!", font=(None, 20, "bold"))
  if lives == 0:
    score.clear()
    cannon.goto(0, -100)
    cannon.hideturtle()
    enemy.hideturtle()
    bullet.hideturtle()
    bullet.goto(0, -30)
    game_over.color('red')
    game_over.write("Game Over", font=(None, 20, "bold"))
    game_over.goto(-140, -40)
    game_over.write("You scored %d points!" % live_score, font=(None, 20, "bold"))
  bullet.hideturtle()


#image adding
screen.addshape(image_coconut)
screen.addshape(image_banana)
screen.addshape(image_pineapple)
screen.addshape(image_cannon)

def cannon_left():
  global cannon_x
  if cannon_x == -140:
    cannon_x = 140
    cannon.goto(cannon_x, -100)
  cannon_x = cannon_x - 10
  cannon.goto(cannon_x, -100)
  bullet.goto(cannon_x, -30)

def cannon_right():
  global cannon_x
  if cannon_x == 140:
    cannon_x = -140
    cannon.goto(cannon_x, -100)
  cannon_x = cannon_x + 10
  cannon.goto(cannon_x, -100)
  bullet.goto(cannon_x, -30)

#setup
screen.bgcolor('white')

game_over.hideturtle()
game_over.speed(0)
game_over.penup()
game_over.goto(-100, 0)

win.hideturtle()
win.speed(0)
win.penup()
win.goto(-100, 0)

bullet.hideturtle()
bullet.speed(5)
bullet.penup()
bullet.shape('circle')
bullet.goto(0, -140)
bullet.left(90)

enemy.speed(0)
enemy.penup()
enemy.hideturtle()
enemy.goto(0, 140)
screen.addshape(image_coconut)
enemy.shape(image_coconut)
enemy.showturtle()

cannon.speed(0)
cannon.penup()
cannon.hideturtle()
cannon.goto(0, -100)
screen.addshape(image_cannon)
cannon.shape(image_cannon)
cannon.showturtle()
cannon.left(90)

score.speed(0)
score.penup()
score.hideturtle()
score.goto(-45, -190)
score.color('black')
score.write("Your score: %s" % live_score, font=(None, 11, "bold"))

#bindings
wn.onkey(cannon_right, "D")
wn.onkey(cannon_left, "A")
wn.onkey(cannon_right, "Right")
wn.onkey(cannon_left, "Left")
wn.onkey(cannon_shooting, "SPACE")

#movement
enemy.forward(move_speed)
if enemy.xcor() == 140:
  enemy.left(180)
  enemy.forward(move_speed)
if enemy.xcor() == -140:
  enemy.right(180)
  enemy.forward(move_speed)
  if enemy1 == 1:
    screen.addshape(image_banana)
    enemy.shape(image_banana)
  if enemy1 == 2:
    screen.addshape(image_pineapple)
    enemy.shape(image_pineapple)
  if enemy1 == 3:
    enemy.shape(image_coconut)

#others
wn.listen()
wn.mainloop()

注意：我正在
welkit.io
中创建游戏。要在
韦小宝中查看该程序，请单击。
问题是如果bullet.xcor（）=bullet.xcor（）-10:
，您会说
=
用于赋值，但是如果
块中有
，则不能在
中进行赋值。如果bullet.xcor（）==bullet.xcor（）-10:
寻求调试帮助的问题（“为什么此代码不起作用？”）必须包括所需的行为、特定的问题或错误以及在问题本身中重现它所需的最短代码，则应将其更改为
。没有明确问题陈述的问题对其他读者没有用处。请参阅：如何创建一个最小、完整且可验证的示例。我很确定这段代码远不是一个简单的例子，这对我没有帮助。是的，它修复了错误，但坐标仍然混乱。