Question

在这里填写新手。我可以知道为什么在运行此代码时收到错误消息（NameError：未定义名称“ width”）吗？谢谢：）

from tkinter import *
from turtle import *

root = Tk()
T = Text(root, root.title("Controls"), height=8, width=60)
T.pack()
T.insert(END, """Right arrow key = move forward\nLeft arrow key = move 
backward\nr = turn right\nl = turn left\n
u = pen up\nd = pen down\nh = go home\nc = clear""")


def main():
    width(2)
    speed(0)
    pencolor("blue")
    onkey(up, "u")
    onkey(down, "d")
    onkey(clear, "c")
    onkey(home, "h")
    onkey(lambda: forward(5), "right")
    onkey(lambda: back(5), "left")
    onkey(lambda: left(5), "l")
    onkey(lambda: right(5), "r")
    listen()
    return "Done!"


if __name__ == "__main__":
msg = main()
print(msg)
mainloop()

Answer 1

我收到错误消息（NameError：未定义名称“ width”）运行此代码

运行此代码时，出现错误：

_tkinter.TclError：错误的事件类型或键盘符号“正确”

这段代码很乱，特别是：

它通过以不受控制的方式组合乌龟和tkinter来放置两个窗口。当turtle独立时，我们使用Turtle和Screen，但是当嵌入tkinter时，我们使用RawTurtle和TurtleScreen。与其让第二个窗口成为忽略规则的副作用，不如让您真正控制该窗口的创建。
此代码似乎是将根窗口的标题设置为将None作为XView参数传递给Text()的副作用：

T =文本（root，root.title（“控件”），高度= 8，宽度= 60）
您为箭头使用了错误的键名-对于乌龟的'Left'函数，它们应为'Right和onkey()'，而不是'left'和'right'。

这是我对如何构造此类程序的理解：

import tkinter as tk
from turtle import RawTurtle, ScrolledCanvas, TurtleScreen

root = tk.Tk()

instructions = tk.Toplevel()
instructions.title("Controls")

text = tk.Text(instructions, height=8, width=60)
text.pack()
text.insert(tk.END, """Right arrow key = move forward\nLeft arrow key = move
backward\nr = turn right\nl = turn left\n
u = pen up\nd = pen down\nh = go home\nc = clear""")

canvas = ScrolledCanvas(root, width=500, height=500)
canvas.pack()

screen = TurtleScreen(canvas)

turtle = RawTurtle(screen, 'turtle')
turtle.pencolor('blue')
turtle.width(2)

screen.onkey(turtle.penup, "u")
screen.onkey(turtle.pendown, "d")
screen.onkey(turtle.clear, "c")
screen.onkey(turtle.home, "h")

screen.onkey(lambda: turtle.forward(5), "Right")
screen.onkey(lambda: turtle.backward(5), "Left")
screen.onkey(lambda: turtle.left(5), "l")
screen.onkey(lambda: turtle.right(5), "r")

screen.listen()

screen.mainloop()

乌龟属性未定义

1 个答案: