How To Create New Tkinter Window After Mainloop()?

I want to dynamically create Tkinter windows on my screen. I understand that I should only have one mainloop(). I use the threading module to make mainloop execute in a seperate th

Solution 1:

How do I create more Tkinter windows after I executed mainloop?

You don't. That's not how Tkinter is designed to work. You should always call mainloop exactly once, and from the main thread.

Solution 2:

Additional (non-root) windows are simply Toplevel widgets. You would simply subclass Toplevel, and call it from within your main class:

class MyCustomWindow(tkinter.Toplevel):
    def __init__(self):
        tkinter.Toplevel.__init__(self)
        #setup goes here


class App(tkinter.Tk):

    def someCallback(self):
        self.anotherWindow = MyCustomWindow()

EDIT

You don't have to subclass Toplevel of course, you can use it directly.