Running a Tkinter form in a separate thread

I have written a short module that can be passed an image and simply creates a Tkinter window and displays it. The problem that I am having is that even when I instantiate and call the method that displays the image in a separate thread, the main program will not continue until the Tkinter window is closed. Here is my module: ``` import Image, ImageTk import Tkinter class Viewer(Tkinter.Tk): def __init__(self,parent): Tkinter.Tk.__init__(self,parent) self.parent = parent self.initialize() def initialize(self): self.grid() def show(self,img): self.to_display = ImageTk.PhotoImage(img) self.label_image = Tkinter.Label(self,image=self.to_display) self.label_image.grid(column = 0, row = 0, sticky = "NSEW") self.mainloop() ``` It seems to work fine, except when I call it from my test program like the one below, it will not seem to allow my test program to continue, even when started in a different thread. ``` import Image from viewer import Viewer import threading def showimage(im): view = Viewer(None) view.show(im) if __name__ == "__main__": im = Image.open("gaben.jpg") t = threading.Thread(showimage(im)) t.start() print "Program keeps going..." ``` I think that perhaps my problem is that I should be creating a new thread within the module itself, but I was wanting to just try and keep it simple, as I am new to Python. Anyway, thanks in advance for any assistance. edit: To clarity, I am just trying to make a module that will display an image in a Tkinter window, so that I can use this module any time I want to display an image. The problem that I am having is that any time a program uses this module, it cannot resume until the Tkinter window is closed.