Notepad.py

import tkinter as tk
from tkinter.constants import END
from tkinter.filedialog import askopenfilename , asksaveasfilename


def saving_file():
    file_location = asksaveasfilename(
        defaultextension="txt" ,
        filetypes = [("Text Files","*.txt"),["All files ","*.*"]])
    if not file_location:
        return
    with open(file_location,"w") as file_output:
        text = text_edit.get(1.0,tk.END)
        file_output.write(text)
    root.title(f"MY OWN NOTEPAD - {file_location}")

def opening_file():
     file_location = askopenfilename(
         filetypes = [("Text Files","*.txt"),("All files","*.*")])
     if not file_location:
         return
         text_edit.delete(1.0,tk.END)
     with open(file_location , "r") as file_input:
          text = file_input.read()
          text_edit.insert(tk.END,text)
     root.title(f"MY OWN NOTEPAD - { file_location}")

root=tk.Tk()
root.title("Notepad")
root.rowconfigure(0,minsize=800)
root.columnconfigure(1,minsize=800)

text_edit = tk.Text(root)  #text is a function
text_edit.grid(row=0 , column=1 ,sticky="nsew")

frame_button =  tk.Frame(root , relief = tk.RAISED , bd=3)
frame_button.grid(row=0,column=0,sticky="nsew")

button_open = tk.Button(frame_button,text="OPEN FILE" ,command = opening_file)
button_open.grid(row=0,column=0,padx=5,pady=5)

button_save  = tk.Button(frame_button,text="SAVE AS" ,command= saving_file)
button_save.grid(row=1,column=0 ,padx=5)

root.mainloop()