Question

我使用tkinter在python 3.5中编写了一个代码，我在从复选框的当前状态（True / False）中获取正确的值时遇到了问题。出于某种原因，我并不总是正确的价值。这是产生问题的代码的一小部分：

import tkinter as tk
from tkinter import messagebox

# go button event listener
def goButtonCallBack():
    global show_skeleton_whole_body, show_skeleton_no_legs
    show_skeleton_whole_body = var_whole_body.get()
    show_skeleton_no_legs = var_no_legs.get()
    if show_skeleton_whole_body==False and show_skeleton_no_legs==False:
        messagebox.showinfo("Try again", "You must choose one of the options!")
        return


if __name__ == '__main__':
    top = tk.Tk()
    top.geometry("650x550")
    var_whole_body = tk.IntVar()
    checkbox_whole_body = tk.Checkbutton(top, text = "Whole Body", variable = var_whole_body, \
                     onvalue = True, offvalue = False, height=5, \
                     width = 200)

    show_skeleton_whole_body = var_whole_body.get()
    print ('main before select: show_skeleton_whole_body')
    print (show_skeleton_whole_body)

    checkbox_whole_body.select()

    show_skeleton_whole_body = var_whole_body.get()
    print ('main after select: show_skeleton_whole_body')
    print (show_skeleton_whole_body)

    checkbox_whole_body.pack(side=tk.LEFT)
    checkbox_whole_body.place(x=15, y=200, width=100)

    var_no_legs= tk.IntVar()
    checkbox_no_legs = tk.Checkbutton(top, text = "  No Legs", variable = var_no_legs, \
                     onvalue = True, offvalue = False, height=4, \
                     width = 200)

    show_skeleton_no_legs = var_no_legs.get()
    print ('main before select: show_skeleton_no_legs')
    print (show_skeleton_no_legs)

    checkbox_no_legs.select()

    show_skeleton_no_legs = var_no_legs.get()
    print ('main after select: show_skeleton_no_legs')
    print (show_skeleton_no_legs)


    checkbox_no_legs.pack(side=tk.LEFT)
    checkbox_no_legs.place(x=15, y=250, width=100)


    # create the 'go' button
    bluebutton = tk.Button(top, text="go! >", fg="blue", command=goButtonCallBack)
    bluebutton.place(x=90, y=400)

    # instruction
    instructionsString = "bla bla bla"
    instructionsLabel = tk.Label(top, text=instructionsString, width=500, font=("Helvetica", 9))
    instructionsLabel.pack()
    instructionsLabel.place(x=15, y=450, width=500)

    top.mainloop()
    print('This is the end of the program!!')

由于某种原因，select（）命令没有将值从0更改为1。如果你运行代码并按下“去”。按钮会出现一个消息框，说明应该检查其中一个复选框但是它们都被检查了！谁知道问题是什么？

由于大卫

python 3.5复选框值不正确

0 个答案: