How to change button color with tkinter

Question

I keep getting the following error: AttributeError: 'NoneType' object has no attribute 'configure'

# create color button
self.button = Button(self,
                     text = "Click Me",
                     command = self.color_change,
                     bg = "blue"
                    ).grid(row = 2, column = 2, sticky = W)

def color_change(self):
    """Changes the button's color"""

    self.button.configure(bg = "red")

score 18 · Accepted Answer · edited Mar 17 '15 at 00:01

18

When you do self.button = Button(...).grid(...), what gets assigned to self.button is the result of the grid() command, not a reference to the Button object created.

You need to assign your self.button variable before packing/griding it. It should look something like this:

self.button = Button(self,text="Click Me",command=self.color_change,bg="blue")
self.button.grid(row = 2, column = 2, sticky = W)

edited Mar 17 '15 at 00:01

nbro

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answered Apr 04 '11 at 20:38

Symon

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excellent, that's the fix! much thanks! – Paul Ronjak Apr 04 '11 at 20:41
5

How do you change the background once you have already made the button? – RhetoricalRuvim Feb 01 '18 at 00:17
@RhetoricalRuvim Kindly see my answer for your query. Thanks. – technazi Oct 01 '18 at 20:49
only bg="red" also works Thanks – Hamza Tahir Jun 13 '19 at 11:40

score 4 · Answer 2 · answered Oct 01 '18 at 20:47

Another way to change color of a button if you want to do multiple operations along with color change. Using the Tk().after method and binding a change method allows you to change color and do other operations.

Label.destroy is another example of the after method.

    def export_win():
        //Some Operation
        orig_color = export_finding_graph.cget("background")
        export_finding_graph.configure(background = "green")

        tt = "Exported"
        label = Label(tab1_closed_observations, text=tt, font=("Helvetica", 12))
        label.grid(row=0,column=0,padx=10,pady=5,columnspan=3)

        def change(orig_color):
            export_finding_graph.configure(background = orig_color)

        tab1_closed_observations.after(1000, lambda: change(orig_color))
        tab1_closed_observations.after(500, label.destroy)


    export_finding_graph = Button(tab1_closed_observations, text='Export', command=export_win)
    export_finding_graph.grid(row=6,column=4,padx=70,pady=20,sticky='we',columnspan=3)

You can also revert to the original color.

How to change button color with tkinter

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