Python / Tkinter动态更新标签

Question

I am currently trying to make a GUI to an existing python program using Tkinter. The program gives the user two options from which the user must choose to either accept or decline. Before using Tkinter the options were placed in the terminal and awaited for a raw_input. (y/n). How can I make this so the canvas text updates with the new data and awaits for the users button click?

To make my question more specific: How can I run another programs code while the Tkinter mainloop is running and make these two interact?

Example code below.

from Tkinter import *

root = Tk()
root.resizable(width=False, height=False)
root.geometry('{}x{}'.format(500,550))
root.wm_title("Tkinter test")

BtnFrame = Frame (root)
BtnFrame.pack(side = BOTTOM)
BtnFrame.place(y=450, x=20)

canvas_1 = Canvas(root, width = "200", height ="300")
canvas_2 = Canvas(root, width = "250", height ="300")
canvas_1.pack(side = LEFT)
canvas_2.pack(side = RIGHT)

textfield_1 = canvas_1.create_text(100,50)
textfield_2 = canvas_2.create_text(100,50,)


def update_textfiel_1(text):
   global textfield_1
   canvas_1.delete(textfield_1)
   textfield = canvas.create_text(100,50,text = text)

def update_textfiel_2(text):
   global textfield_2
   canvas_2.delete(textfield_2)
   textfield1 = canvas1.create_text(100,50,text = text)



 Accept = Button(BtnFrame, text="Accept", width=25)
 Decline = Button(BtnFrame, text="Decline", width=25)

 Accept.pack(side = LEFT)
 Decline.pack(side = RIGHT)

 root.mainloop()

Answer 1

First off you have some inconsistent variable names in your update_textfiel functions, you can greatly simplify it by using .itemconfigure ( documentation for methods on canvas widget )

def update_textfiel_1(new_text):
   canvas_1.itemconfigure(textfield_1, text=new_text)

def update_textfiel_2(new_text):
   canvas_2.itemconfigure(textfield_2, text=new_text)

If I understand correctly you want a way to have a function that will simply wait for the user to press one of the buttons and then return the result, this is very easy with tkMessageBox :

question = """Do you accept {}?
if you say no you will instead get {}"""
#this message can GREATLY be improved
# But I really don't understand what you are using it for...

def user_confirmation(name1, name2):
    response = tkMessageBox.askyesno("Accept or Decline",question.format(name1,name2))
    print(response)
    if response: # == True
        return name1
    else:
        return name2

I have not yet found a way to make a blocking function that works with the window you have currently...