Tkinter Labels self update - python-3.x

Question

I have a linkedlist implemented in Python and for every node I need a label in a Tkinter window. The problem I have is that I don't know how to update the label when the corresponding node data changes.
currently I have this code for the window that displays all the nodes and the data within the nodes in its default "no data" state.
def interface(self):
Window = Tk()
Row = 0
current_node = self.get_top_of_list()
while current_node is not None:
Label(Window, text = current_node).grid(row = Row, column = 0)
Label(Window, text = current_node.data).grid(row = Row, column = 1)
current_node = current_node.next_node
Row +=1
mainloop()

Answer 1

As furas also points out in the comment, Label widget will show its textvariable at all times, so you can modify the object that is assigned to textvariable, without referencing the label object again.
I'd add an attribute, dataLabel which later will hold my variable class object.
class Node:
def __init__(self, data):
self.data = data
self.next_node = None
self.dataLabel = None
then assign that variable class object, self.dataLabel to my label's textvariable in my interface method:
def interface(self):
Window = Tk()
Row = 0
current_node = self.get_top_of_list()
while current_node is not None:
current_node.dataLabel = StringVar() #assuming from Window tkinter is imported as wildcard
current.node.dataLabel.set(current_node.data)
Label(Window, textvariable = current_node.dataLabel).grid(row = Row, column = 0)
current_node = current_node.next_node
Row +=1
mainloop()
A similar object can be created for next_node attribute as well.

Answer 2

Label changes text automatically if it uses StringVar with textvariable= in Label and you change text in StringVar.
Linkedlist can't update labels automatically - you have to write function for it.
You could keep access to Label or StringVar inside node and node could change value in Label or StringVar when you change value in node.
See Observer Pattern. Node could be "subject" (class Observable) and Label or StringVar could be "observer" (class Observer)
BTW: StringVar/IntVar/otherVar use pattern Observer. StringVar is "subject" and you can use StringVar.trace() to assign function to StringVar (it will be "observer") and StringVar will execute this function automatically when you change value in StringVar.
More on effbot.org: The Variable Classes (BooleanVar, DoubleVar, IntVar, StringVar)
Other method is to use root.after to execute function which will get all data from nodes and updates Labels
Simple example which use after() to display current time
import tkinter as tk
from datetime import datetime
# --- functions ---
def update_time():
# get current date & time as text
current = datetime.now().strftime('%Y.%m.%d %H:%M:%S')
# update label with current date and time
label['text'] = current
# run update_time again after 1000ms (1s)
root.after(1000, update_time)
# --- main ---
root = tk.Tk()
# create Label without text - update_time will set text
label = tk.Label(root)
label.pack()
# run update_time first time
update_time()
root.mainloop()