Python tkinter how to get value from an entry box-CodePudding

I am trying to make a little thing in python like JOpenframe is java and I'm trying to make an entry box. That works fine but when I try to get the value and assign it to variable "t" nothing works. This is what I have:

def ButtonBox(text):
    root = Tk()
    root.geometry("300x150")
    t = Label(root, text = text, font = ("Times New Roman", 14))
    t.pack()
    e = Entry(root, borderwidth = 5, width = 50)
    e.pack()
    def Stop():
        root.destroy()
        g = e.get()
    ok = Button(root, text = "OK", command = Stop)
    ok.pack()
    root.mainloop()
t = ButtonBox("f")

I've tried to make "g" a global variable but that doesn't work. I have no idea how to get the value from this, and I'm hoping someone who does can help me out. Thanks!

CodePudding user response：

If you want to return the value of the entry box after ButtonBox() exits, you need to:

initialize g inside ButtonBox()
declare g as nonlocal variable inside inner function Stop()
call g = e.get() before destroying the window

Below is the modified code:

from tkinter import *

def ButtonBox(text):
    g = ""   # initialize g
    root = Tk()
    root.geometry("300x150")
    t = Label(root, text = text, font = ("Times New Roman", 14))
    t.pack()
    e = Entry(root, borderwidth = 5, width = 50)
    e.pack()
    def Stop():
        # declare g as nonlocal variable
        nonlocal g
        # get the value of the entry box before destroying window
        g = e.get()
        root.destroy()
    ok = Button(root, text = "OK", command = Stop)
    ok.pack()
    root.mainloop()
    # return the value of the entry box
    return g
t = ButtonBox("f")
print(t)