repeat tkinter

[Peter Otten]

Robin wrote:

> How can I make a command within a tkinter application repeat itself
> over and over in intervals of a certain time.

>>> import Tkinter as tk
>>> root = tk.Tk()
>>> color = "blue"
>>> def switch_color():
...     global color
...     if color == "blue":
...             color = "red"
...     else:
...             color = "blue"
...     root["background"] = color
...     root.after(500, switch_color)
...
>>> switch_color()