[Tkinter] Button 'command' Argument Confusion

[menator01]

Simple example with partial

#! /usr/bin/env python3
import tkinter as tk
from functools import partial

def callback(argument, label):
    label['text'] = f'Called Text -> {argument}'

root = tk.Tk()
root.geometry('250x70+250+250')

label = tk.Label(None)
label['text'] = 'Default text'
label.pack()

btn = tk.Button(None, text = 'Submit')
btn['command'] = partial(callback, 'This text was called', label)
btn.pack()

root.mainloop()