user interface - Python Tkinter - resize widgets evenly in a window

Question

I have a small test Python app as I am learning both Python and Tkinter and I am trying to figure out how to evenly resize a grid of labels in a window. I would like to make a large grid of different colored squares so I'm using labels with a background color set to make the squares. I would like to resize the squares automatically when the user expands the window out and then have them resize and scale down to all be the same size as the window is decreased in size.

Something like this:

That resizes and scales evenly like this:

In other words: each label should all scale uniformly as the window scales. I'm not even sure if I'm using the correct terms with "window" and "widget". But I'm placing labels on a gui.

Test code I'm using to try to get this to work:

    import Tkinter

class simpleapp_tk(Tkinter.Tk):
    def __init__(self,parent):
        Tkinter.Tk.__init__(self,parent)
        self.parent = parent
        self.initialize()

    def initialize(self):
        self.grid()

        label = Tkinter.Label(self,anchor="center",bg="green")
        label.grid(column=0,row=0,sticky='EW')

        label2 = Tkinter.Label(self,anchor="center",bg="black")
        label2.grid(column=1,row=0,sticky='EW')

        label3 = Tkinter.Label(self,anchor="center",bg="red")
        label3.grid(column=2,row=0,sticky='EW')

        label4 = Tkinter.Label(self,anchor="center",bg="purple")
        label4.grid(column=0,row=1,sticky='EW')

        label5 = Tkinter.Label(self,anchor="center",bg="blue")
        label5.grid(column=1,row=1,sticky='EW')

        label6 = Tkinter.Label(self,anchor="center",bg="yellow")
        label6.grid(column=2,row=1,sticky='EW')


        self.grid_columnconfigure(0,weight=0)

if __name__ == "__main__":
    app = simpleapp_tk(None)
    app.title("Test App")
    app.mainloop()

Answer 1

Give all rows and columns the same non-zero weight.

For example:

self.grid_columnconfigure(0,weight=1)
self.grid_columnconfigure(1,weight=1)
self.grid_columnconfigure(2,weight=1)
self.grid_rowconfigure(0,weight=1)
self.grid_rowconfigure(1,weight=1)