from tkinter import *

class RBDemo:
    def __init__(self, win):
        self.v = IntVar()
        
        #Put the first group of radio buttons in their own frame.
        f1 = Frame(win, borderwidth=3, relief=RAISED)
        rb1 = Radiobutton(f1, text="One", variable=self.v, value=1)
        rb2 = Radiobutton(f1, text="Two", variable=self.v, value=2)
        rb3 = Radiobutton(f1, text="Three", variable=self.v, value=3)
        rb1.pack(anchor=W);  rb2.pack(anchor=W);   rb3.pack(anchor=W)
        f1.pack(side=LEFT)

        #Button one will be selected by default
        self.v.set(1)        

        
        #Make a second group of radiobuttons in their own frame.
        #No button is set by default, and their values are strings.
        self.v2 = StringVar()
        f2 = Frame(win, borderwidth=2, relief=SOLID)

        rb4 = Radiobutton(f2, text="Green", variable=self.v2, value="r")
        rb5 = Radiobutton(f2, text="Red", variable=self.v2, value="g")
        rb4.pack(anchor=W);  rb5.pack(anchor=W)
        f2.pack(side=RIGHT)

        #Make a button that prints what each value is when clicked
        b = Button(win, text="try it!", command=self.clicked)
        b.pack(side=BOTTOM, fill=BOTH, expand=1)


    def clicked(self):
        print("button clicked!")
        print("v is:", self.v.get())
        print("v2 is:", self.v2.get() )



mw = Tk()
app = RBDemo(mw)
mw.mainloop()