Python 元组以随机间隔停止更新

我正在尝试制作一个蛇类游戏，有时它可以工作，我基本上可以附加一块8次，然后游戏停止工作。然后，我再次运行它，它在崩溃之前工作一两次。我尝试过创建一些方法，使添加到蛇身上更容易，但我似乎无法始终让它工作。下面是对代码的回复。非常感谢您的帮助

##### SNAKE.PY #####
from turtle import *
from random import *


# noinspection PyShadowingNames
class Snake:
    """Class that creates the initial snake object"""

    def __init__(self):
        # Make starting point of snake game
        self.start_positions = [(0, 0), (-20, 0), (-40, 0)]
        # Used to store created parts, the snakes body
        self.snake_body = []

        for position in self.start_positions:
            # Create 3 white squares
            t = Turtle('square')
            t.penup()
            t.speed('normal')
            t.color('white')
            # Send them to the starting spot
            t.goto(position)
            # Add to snake body
            self.snake_body.append(t)
            # Declare first part as head for ease of use
        self.snake_head = self.snake_body[0]

    def move(self):
        """Function used to move all the snake body parts forward"""
        for part in range(len(self.snake_body) - 1, 0, -1):
            # Loop through parts backwards to get them to move at same time
            new_x = self.snake_body[part - 1].xcor()
            new_y = self.snake_body[part - 1].ycor()
            self.snake_body[part].goto(new_x, new_y)
        self.snake_head.fd(10)

    def up(self):
        """Sets snake positioning north"""
        self.snake_head.seth(90)

    def down(self):
        """Sets snake positioning south"""
        self.snake_head.seth(270)

    def left(self):
        """Sets snake positioning west"""
        self.snake_head.seth(180)

    def right(self):
        """Sets snake positioning east"""
        self.snake_head.seth(0)

    def add_part(self):
        """Function to add a new part"""
        t = Turtle('square')
        t.penup()
        t.speed('normal')
        t.color('white')
        self.snake_body.append(t)


class Parts:
    """Class to create dots to add to the snakes length"""

    def __init__(self, screen):
        self.screen = screen
        self.dot = Turtle('square')
        self.dot.color('white')
        self.dot.penup()

    def generate_dot_cor(self):
        x = randrange(-280, 280, 10)
        y = randrange(-280, 280, 10)
        return x,y

####### MAIN.PY #######

from turtle import *
from snake import Snake, Parts
import time

# Screen setup
screen = Screen()
screen.setup(600, 600)
screen.bgcolor('black')
screen.title('My Snake Game')
screen.tracer(0)

# Call the snake class from the snake.py file
snake = Snake()
# Call the Parts class from the snake.py file
dot = Parts(screen)
dot.dot.goto(dot.generate_dot_cor())
# Keep track of player score
score = 0

# Set initial coordinates
coors = dot.generate_dot_cor()

target = []

# Set loop flag
game_on = True

while game_on:
    # Update the screen every loop to move snake forward
    screen.update()
    time.sleep(0.05)

    # Method from snake class that continuously moves the snake
    snake.move()

    if snake.snake_head.pos() == dot.dot.pos():
        snake.add_part()
        new_coors = dot.generate_dot_cor()
        print(new_coors)
        dot.dot.goto(new_coors)



    # Allows user to rotate snake head depending on the button pressed
    screen.onkey(snake.up, 'Up')
    screen.onkey(snake.right, 'Right')
    screen.onkey(snake.down, 'Down')
    screen.onkey(snake.left, 'Left')
    screen.listen()

screen.exitonclick()

Edit: Changed format of code

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您必须在问题中提供文本格式的代码，还必须提供一个最小的可复制示例，而不是整个代码（这也是可测试的，意味着我们可以在没有问题的情况下运行它，但它很简洁）@马蒂斯：是这样的吗？这当然更好，我建议在你的帖子中保留完整的代码，但你也必须提供一个最小的可复制示例，请阅读这里：