Python 让我的单选按钮显示在tkinter的画布下？

我正在写一个创建红绿灯的程序，我把程序都设置好了，它工作正常，但是我在格式上有一个小问题。我希望单选按钮位于“红绿灯”的底部，而不是顶部

from tkinter import *

class TrafficLight:

    def __init__(self):

        window = Tk()
        window.title("Traffic Light")

        frame = Frame(window)
        frame.pack()

        self.color = StringVar()

        rbRed = Radiobutton(frame, text = "Red", variable = self.color, value = "R", command = self.colorChange)
        rbRed.grid(row = 1, column = 1)

        rbYellow = Radiobutton(frame, text = "Yellow", variable = self.color, value = "Y", command = self.colorChange)
        rbYellow.grid(row = 1, column = 2)

        rbGreen = Radiobutton(frame, text = "Green", variable = self.color, value = "G", command = self.colorChange)
        rbGreen.grid(row = 1, column = 3)

        self.canvas = Canvas(window, width = 80, height = 180, bg = "white")
        self.canvas.pack()

        self.red = self.canvas.create_oval(20,20,60,60, fill = "white")
        self.yellow = self.canvas.create_oval(20,70,60,110, fill = "white")
        self.green = self.canvas.create_oval(20,120,60,160, fill = "white")

        window.mainloop()

    def colorChange(self):
        on = self.color.get()

        if on == "R":
            self.canvas.itemconfig(self.red, fill = "red")
            self.canvas.itemconfig(self.yellow, fill = "white")
            self.canvas.itemconfig(self.green, fill = "white")
        elif on == "Y":
            self.canvas.itemconfig(self.red, fill = "white")
            self.canvas.itemconfig(self.yellow, fill = "yellow")
            self.canvas.itemconfig(self.green, fill = "white")
        elif on == "G":
            self.canvas.itemconfig(self.red, fill = "white")
            self.canvas.itemconfig(self.yellow, fill = "white")
            self.canvas.itemconfig(self.green, fill = "green")

看起来是这样的：

当您使用

pack（）

这是放置在初始部分时，您必须更改顺序

from tkinter import *

class TrafficLight:

    def __init__(self):

        window = Tk()
        window.title("Traffic Light")

        self.canvas = Canvas(window, width = 80, height = 180, bg = "white")
        self.canvas.pack()

        frame = Frame(window)
        frame.pack()

        self.color = StringVar()

        rbRed = Radiobutton(frame, text = "Red", variable = self.color, value = "R", command = self.colorChange)
        rbRed.grid(row = 1, column = 1)

        rbYellow = Radiobutton(frame, text = "Yellow", variable = self.color, value = "Y", command = self.colorChange)
        rbYellow.grid(row = 1, column = 2)

        rbGreen = Radiobutton(frame, text = "Green", variable = self.color, value = "G", command = self.colorChange)
        rbGreen.grid(row = 1, column = 3)


        self.red = self.canvas.create_oval(20,20,60,60, fill = "white")
        self.yellow = self.canvas.create_oval(20,70,60,110, fill = "white")
        self.green = self.canvas.create_oval(20,120,60,160, fill = "white")

        window.mainloop()

    def colorChange(self):
        on = self.color.get()

        if on == "R":
            self.canvas.itemconfig(self.red, fill = "red")
            self.canvas.itemconfig(self.yellow, fill = "white")
            self.canvas.itemconfig(self.green, fill = "white")
        elif on == "Y":
            self.canvas.itemconfig(self.red, fill = "white")
            self.canvas.itemconfig(self.yellow, fill = "yellow")
            self.canvas.itemconfig(self.green, fill = "white")
        elif on == "G":
            self.canvas.itemconfig(self.red, fill = "white")
            self.canvas.itemconfig(self.yellow, fill = "white")
            self.canvas.itemconfig(self.green, fill = "green")

TrafficLight()

---

我不说了，但我自己解决了。我只是将frame和frame.pack（）放在self.canvas.pack（）之后。只需要一些重新排列通常，您会为

.pack（）

调用（

.pack（side='bottom'）

）提供一些参数，以控制它们相对于其他小部件的排列位置。