Question

This is the file I launch with python :

from Tkinter import *

# Esempio di GUI

def main():
    w1 = Tk()
    w1.title("Finestra 1")
    f1 = Frame(w1)
    f1.pack()
    w1.mainloop()

main()

The program is in execution, but I don’t see any window appearing.
I have to close the terminal window to stop, I don’t get why.

Answer 1

Give the frame a width and height:

from Tkinter import *

# Esempio di GUI

def main():
    w1=Tk()
    w1.title("Finestra 1")
    # Width, height in pixels
    f1=Frame(w1, height=50, width=50)
    f1.pack()
    w1.mainloop()

main()