如何让这个程序成功运行?

时间:2021-05-10 20:06:44

标签: python

我正在通过一本书学习python,并且有一个简化版Pong的代码。我编写了代码,但不断收到错误消息。任何人都可以帮忙吗?我正在使用 3.9.2 并附上下面的代码和错误消息。

from tkinter import*
import random
import time

class Ball:
    def __init__(self, canvas, paddle, color):
        self.canvas = canvas
        self.paddle = paddle
        self.id=canvas.create_oval(10,10,25,25,fill=color)
        self.canvas.move(self.id, 245, 100)
        starts = [-3,-2,-1, 1,2,3]
        random.shuffle(starts)
        self.x=starts[0]
        self.y=-3
        self.canvas_height = self.canvas.winfo_height()
        self.canvas_width = self.canvas.winfo_width()
        self.hit_bottom = False
    
    def hit_paddle(self,pos):
        paddle_pos = self.canvas.coords(self.paddle.id)
        if pos[2] >= paddle_pos[0] and pos[0] <= paddle_pos[2]:
            if pos[3] >= paddle_pos[1] and pos[3] <= paddle_pos[3]:
                return True
        return False
    

    def draw(self):
        self.canvas.move(self.id, self.x, self.y)
        pos = self.canvas.coords(self.id)
        if pos[1] <= 0:
            self.y = 3
        if pos[3] >= self.canvas_height:
            self.hit_bottom = True
        if self.hit_paddle(pos) == True:
            self.y = -3
        if pos[0] <= 0:
            self.x = 3
        if pos[2] >= self.canvas_width:
            self.x = -3

class Paddle:
    def __init__(self, canvas, color):
        self.canvas = canvas
        self.id = canvas.create_rectangle(0, 0, 100, 10, fill=color)
        self.canvas.move(self.id,200,300)
        self.x = 0
        self.canvas_width = self.canvas.winfo_width()
        self.canvas.bind_all('<Keypress-Left>', self.turn_left)
        self.canvas.bind_all('<Keypress-Right>', self.turn_right)
    
    def draw(self):
        self.canvas.move(self.id, self.x, 0)
        pos = self.canvas.coords(self.id)
        if pos[0] <= 0:
            self.x = 0
        elif pos[2] >= self.canvas_width:
            self.x = 0
       
    def turn_left(self,evt):
        self.x = -2

    def turn_right(self,evt):
        self.x = 2





tk=Tk()
tk.title=('Game')
tk.resizable(0,0)
tk.wm_attributes('-topmost', 1)
canvas = Canvas(tk, width=500, height=500, bd=0, highlightthickness=0)
canvas.pack()
tk.update()

paddle = Paddle(canvas, 'blue')
ball = Ball(canvas, paddle, 'red')

while 1:
    if ball.hit_bottom == False:
        ball.draw()
        paddle.draw()
    tk.update_idletasks()
    tk.update()
    time.sleep(0.01)

错误信息: 回溯(最近一次调用最后一次): 文件“/Users/bennettsullivan/Documents/BOUNCE!!!.py”,第 77 行,在 桨 = 桨(画布,'蓝色') init 中的文件“/Users/bennettsullivan/Documents/BOUNCE!!!.py”,第 48 行 self.canvas.bind_all('', self.turn_left) 文件“/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/tkinter/init.py”,第1406行,bind_all return self._bind(('bind', 'all'), sequence, func, add, 0) 文件“/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/tkinter/init.py”,第 1346 行,在 _bind 中 self.tk.call(what + (sequence, cmd)) _tkinter.TclError:错误的事件类型或键符“按键”

1 个答案:

答案 0 :(得分:1)

问题出在您的 Paddle 班级中。您的事件绑定应该是驼峰式的(例如,<KeyPress-Left> 而不是 <Keypress-Left>)。将“p”大写后,程序运行良好(只需要一种重新播放游戏或正确关闭游戏的方法)。