Creating a better Hello World Tkinter

#!/usr/bin/env python
# -*- coding: utf-8 -*-
""" Code for << Python GUI Programming with Tkinter >> by Alan D.Moore """
""" A better Hello World for Tkinter """
import tkinter as tk
from tkinter import ttk

# (1) define My widgets module
class HelloView(tk.Frame):
    """ A friendly little module """
    # (1) define initial function
    def __init__(self, parent, *args, **kwargs):
        super().__init__(parent, *args, **kwargs)   # initial parent class
        # initial children class
        # (1) define variables
        self.name = tk.StringVar()              # define tkinter String variable
        self.hello_string = tk.StringVar()      # define tkinter String variable
        self.hello_string.set("Hello World")    # Assign Hello World to self.hello_string
        # (2) initial widgets
        name_label = ttk.Label(self, text = "Name:")    # define a Label widget
        name_entry = ttk.Entry(self, textvariable = self.name)  # define a entry widget, entry value to self.name
        ch_button = ttk.Button(self, text = "Change", command = self.on_change) # define a button named Change.call function on_change
        hello_label = ttk.Label(self, textvariable  = self.hello_string, font = ("TkDefaultFont", 32), wraplength = 600)
        # (3) place widgets
        name_label.grid(row = 0, column = 0, sticky = tk.W) # place in (0,0), west West direction
        name_entry.grid(row = 0, column = 1, sticky = (tk.W + tk.E))
        ch_button.grid(row = 0, column = 2, sticky = tk.E)
        hello_label.grid(row = 1, column = 0, columnspan = 3) # place in (1,0~2), Occupies three grids
        # (4) Adjust the size of rows and columns
        self.columnconfigure(1, weight = 1)
        
    # (2) define other function
    def on_change(self):
        if self.name.get().strip():
            self.hello_string.set("Hello " + self.name.get())
        else:
            self.hello_string.set("Hello World")
            
# (2) define My Application
class MyApplication(tk.Tk):
    """ Hello World Main Application """
    # (1) define initial function
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.title("Hello Tkinter")     # windown name
        self.geometry("400x300")      # windown size  (width x height)
        self.resizable(width = False, height = False)

        # adding My widgets module and setting the place
        HelloView(self).grid(sticky = (tk.E + tk.W + tk.N + tk.S))
        self.columnconfigure(0,weight = 1)
        
                            
# (3) Main function
if __name__ == ‘__main__‘:
    app = MyApplication()
    app.mainloop()