Python UI with Tkinter

Question

I started with Python and Tkinter and am trying to make my first steps by creating a simple UI with a header, sidebar (currently just a label) and a few labels and entries.

Before I go on, I want to ask you if the way I do this is correct and a common one. Also, if you see potential to make this better, please let me know.

import tkinter as tk
from tkinter import messagebox
import tkinter.ttk as ttk
class MainApplication(tk.Frame):
 def __init__(self, parent, *args, **kwargs):
 tk.Frame.__init__(self, parent, *args, **kwargs)
 self.parent = parent
 root.geometry('1280x768')
 root.configure(background='#0E2F47')
 
 root.grid_rowconfigure(20, weight=1) 
 s = ttk.Style()
 s.theme_use('classic') 
 s.configure('SOExample.TEntry', relief='flat')
 s.layout('SOExample.TEntry', [
 ('Entry.highlight', {
 'sticky': 'nswe',
 'children':
 [('Entry.border', {
 'border': '1',
 'sticky': 'nswe',
 'children':
 [('Entry.padding', {
 'sticky': 'nswe',
 'children':
 [('Entry.textarea',
 {'sticky': 'nswe'})]
 })]
 })]
 })])
 
 # GUI elements
 header_img = tk.PhotoImage(file='Header.png')
 
 header_label = tk.Label(root, bg='#191E31', image=header_img)
 header_label.image = header_img
 header_label.grid(column=1, row=0, columnspan=20)
 
 sidebar_label = tk.Label(root, bg='#191E31', width=25)
 sidebar_label.grid(column=1, row=1, rowspan=20, sticky="nws")
 
 # Input Section
 adress_input_label = tk.Label(root, bg='#0E273B', fg='#CEDEEE', text="Adress", font=("Century Gothic", 12), anchor='w') 
 adress_input_label.grid(column=2, columnspan=3, row=1, pady=25, sticky='new')
 
 adress_input_entry = ttk.Entry(root, style='SOExample.TEntry')
 adress_input_entry.grid(row=1, column=3, sticky='e')
 
 message_input_label = tk.Label(root, bg='#0E273B', fg='#CEDEEE', text="Message", font=("Century Gothic", 12), anchor='w') 
 message_input_label.grid(column=2, columnspan=3, row=2, pady=25, sticky='new')
 
 message_input_entry = ttk.Entry(root, style='SOExample.TEntry')
 message_input_entry.grid(row=2, column=3, sticky='e')
 
 
def on_closing():
 if messagebox.askokcancel("Quit", "Do you want to quit?"):
 root.destroy()
if __name__ == "__main__":
 root = tk.Tk()
 
 MainApplication(root).grid(column=0, row=0)
 
 root.protocol("WM_DELETE_WINDOW", on_closing)
 root.mainloop()

Answer 1

It looks like you have the good beginnings for a basic GUI application.

Naming

The code uses the recommended naming style for classes, functions and variables. Most of the names are descriptive. However, s isn't very meaningful in this context:

s = ttk.Style()

I suggest style instead:

style = ttk.Style()

I realize this is currently a generic GUI, but once you create something more specific, you should rename MainApplication to reflect the actual use.

Documentation

The PEP 8 style guide recommends adding docstrings for classes and functions. Again, once you have a specific use, you should add a docstring to describe the class.