how to learn tkinter documentation code example

Example 1: tkinter tutorial

# check this code first.
from tkinter import *

app = Tk()
# The title of the project
app.title("The title of the project")
# The size of the window
app.geometry("400x400")

# Defining a funtion
def c():
    # Label
    m = Label(app, text="Text")
    m.pack()


# Button
l = Button(app, text="The text of the Butoon", command=c)
# Packing the Button
l.pack()
app.mainloop()
# Quick Note : 
# When you put a command you should not use parentheses
# l = Button(app, text="The text of the Butoon", command=c)
# l = Button(app, text="The text of the Butoon", command=c())

Example 2: tkinter tutorial

#Import
import tkinter as tk
from tkinter import ttk
#Main Window
window=tk.Tk()
#Label
label=ttk.Label(window,text="My First App")
#Display label
label.pack()
#Making sure that if you press the close button of window, it closes.
window.mainloop()