Label Not Continually Updating Tkinter

Question

I have read through several answers to similar topics but none of them are relevant to my situation, I am trying to display a list on a label and whenever the button is pressed to update the list the label should update as well but it only updates when submitbtn_name is clicked. Any help appreciated I am very new to Tkinter. My Code:

from tkinter import *

root = Tk()
root.title("Path Creator")
root.geometry('1680x1080')
root['background'] = '#aaaaaa'

list_of_paths_list = []
path_list = []


name = Entry(root, width=400)
name.insert(0, "Name")
name.pack()

def add_name():
    path_list.append(name.get())
    list_label = Label(root, text="path name:" + str(path_list))
    list_label.pack()

submitbtn_name = Button(root, text="submit name", command=add_name)
submitbtn_name.pack()

value1 = Entry(root, width=400)
value1.insert(0, "value1")
value1.pack()

distance1 = Entry(root, width=400)
distance1.insert(0, "distance1")
distance1.pack()

def submitbtn_value_dist():
    temp_list = []
    temp_list.append(value1.get())
    temp_list.append(distance1.get())
    path_list.append(tuple(temp_list))
    list_label = Label(root, text="current path: " + path_list)
    list_label.pack()

submitbtn_pathpart = Button(root, text="submit path part", )
submitbtn_pathpart.pack()
root.mainloop()

The only other button is `submitbtn_pathpart`, but it doesn't have a `command` to call when it's clicked. — Barmar, Aug 21 '21 at 00:29
`text="current path: " + path_list` needs to be `text="current path: " + str(path_list)` — Barmar, Aug 21 '21 at 00:30
Did you forget to add `command=submitbtn_value_dist` to the second button? — Barmar, Aug 21 '21 at 00:30
@Barmar, yup that was it. thanks for the help. Do you know why it isn't updating when I change the values and click the second btn again — Reacher42, Aug 21 '21 at 14:34
You're not updating anything with either button, you keep creating new `Label`s. — Barmar, Aug 21 '21 at 14:39
https://stackoverflow.com/questions/1918005/making-python-tkinter-label-widget-update — Barmar, Aug 21 '21 at 15:18
@Barmar I still don't understand how I would do that, you should set the text to a variable and change it? — Reacher42, Aug 23 '21 at 01:31
I'm not sure how to explain it better than the simple example in that question. — Barmar, Aug 23 '21 at 18:22

score 0 · Answer 1 · answered Jan 05 '23 at 10:31

Using f-string format. Added command in submitbtn_pathpart

Snippet:

def submitbtn_value_dist():
    temp_list = []
    temp_list.append(value1.get())
    temp_list.append(distance1.get())
    path_list.append(tuple(temp_list))
    list_label = Label(root, text=f"current path:{path_list}")
    list_label.pack()

submitbtn_pathpart = Button(root, text="submit path part", command=submitbtn_value_dist )
submitbtn_pathpart.pack()
root.mainloop()

Output for name:

Output for value and distance:

Label Not Continually Updating Tkinter

1 Answers1