How to open Python?

[Yoriz]

I only use windows, I am currently using windows 10 and python 3.9.4
I can create a .py file on my desktop, open it in vs code and using the following code:

import tkinter as tk
from tkinter import ttk


class TkApp(tk.Tk):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.entry = ttk.Entry(self)
        self.entry.pack(padx=5, pady=5)
        self.button = ttk.Button(self, text='Print', command=self.on_button)
        self.button.pack(pady=5)

    def on_button(self):
        print(f'Entry contains: {self.entry.get()}')


if __name__ == '__main__':
    app = TkApp()
    app.mainloop()

click on the little green triangle in the top right corner to run python file in terminal and it just works.
I can also double click on that .py file and it works.