[Tkinter] changing background color of a button

[Tkinter] changing background color of a button - Printable Version

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changing background color of a button - ieee488 - Sep-06-2019

I am a beginner to Python but not to programming in general.

I have the following code for creating 3 buttons:

for i in range(1, 3):
    aButton = "button" + str(i)
    aButton = tkinter.Button(Gui, font=Font1, text=i, image=myPixel, width=70, height=70, compound="c", bg='white', activebackground='white')
    aButton['command'] = partial(setBG, aButton)
    aButton.grid(row=1, column=i)

And it works. I get a three buttons.

Now, I want to use a function called ChangeColor to change the background color to red.

def ChangeColor():
    tkinter.button1['bg'] = 'red'

I run the script but I get

Error:
module 'tkinter' has no attribute 'button1'

How do I get a reference to any of the three buttons and change its background color?

.

RE: changing background color of a button - metulburr - Sep-06-2019

The way you have it written you are just dismissing the reference to each button

Quote:

for i in range(1, 3):
    aButton = "button" + str(i)
    aButton = tkinter.Button(Gui, font=Font1, text=i, image=myPixel, width=70, height=70, compound="c", bg='white', activebackground='white')
    aButton['command'] = partial(setBG, aButton)
    aButton.grid(row=1, column=i)

You only actually obtain the last button as aButton. You need a reference to each button to be able to change each button. So either, append each button to a list to save each reference. Loop the list and change each object color in the list as you please. OR use classes and call the attribute directly to change the color.

RE: changing background color of a button - ieee488 - Sep-06-2019

Thanks.

I created a list of buttons as you suggested.

buttons = []

then I add each button to that list

buttons.append(aButton)

But,

buttons[i]['bg'] = 'red'

does not work.
What is the correct syntax that I need to use?

.

Answering my own question.

I did not need

aButton = "button" + str(i)

for i in range(1, 3):
    aButton = tkinter.Button(Gui, font=Font1, text=i, image=myPixel, width=70, height=70, compound="c", bg='white', activebackground='white')
    buttons.append(aButton)
    aButton['command'] = partial(setBG, aButton)
    aButton.grid(row=1, column=i)

and add

		buttons[i].config(background="red")