Is there a way to make tkinter widget attributes global?

Question

I am making a simple calculator using Python and tkinter and I wanted to save code by making global attributes.

I would like to set default attributes instead of:

myButton = Button(self, text = "A", width = 50, height = 50);
myButton.grid(row = 0, column = 0, width = 50, height = 50);
myButton = Button(self, text = "A", width = 50, height = 50);
myButton.grid(row = 0, column = 1);
myButton = Button(self, text = "A");
myButton.grid(row = 0, column = 2);
myButton = Button(self, text = "A");
myButton.grid(row = 0, column = 3);

I would like to make a default attribute for the Button widget. Any way to make that happen?

Answer 1

The simplest option is probably to create a dictionary of the arguments you want to use as defaults (like the width and height I assume), and pass them in as **kwargs to each Button

And (as @Sembei mentioned), if you need to retain references to each button, you have to use different names for each variable. I've changed them here as an example

# create a dictionary of the properties you want to share for each button
btn_props = {
    'width': 50,
    'height': 50,
    # add other args here as needed
}

# pass 'btn_props' in as keyword arguments (a.k.a. 'kwargs')
myButton1 = Button(self, text = "A", **btn_props);
myButton1.grid(row = 0, column = 0);
myButton2 = Button(self, text = "A", **btn_props);
myButton2.grid(row = 0, column = 1);
myButton3 = Button(self, text = "A", **btn_props);
myButton3.grid(row = 0, column = 2);
myButton4 = Button(self, text = "A", **btn_props);
myButton4.grid(row = 0, column = 3);

Another option is to create your own button class that inherits from tk.Button, but that's slightly more involved

User @TheLizzard has also raised another good point: buttons aren't sized in units of pixels. If you want to do that, the method outlined here is a good solution!