tkinter radio button default selection code example
Example 1: tkinter radio button default selection
self.who_goes_first = tkinter.StringVar(None, "B")
Example 2: tkinter radio button default selection
self.who_goes_first.set("B")
Example 3: tkinter radio button default selection
self.who_goes_first.set("B")
Example 4: tkinter radio button default selection
self.who_goes_first = tkinter.StringVar(None, "B")