button_change_bg.py

from Tkinter import *


class MyApp:
    def __init__(self, parent):
        self.myParent = parent
        self.myContainer1 = Frame(parent)
        self.myContainer1.pack()

        button_name = "OK"

        # command binding
        self.button1 = Button(self.myContainer1,
                              command=lambda
                                  arg1=button_name, arg2=1, arg3="Good stuff!":
                              self.buttonHandler(arg1, arg2, arg3)
                              )

        # event binding -- passing the event as an argument
        self.button1.bind("<Return>",
                          lambda
                              event, arg1=button_name, arg2=1, arg3="Good stuff!":
                          self.buttonHandler_a(event, arg1, arg2, arg3)
                          )

        self.button1.configure(text=button_name, background="green")
        self.button1.pack(side=LEFT)
        self.button1.focus_force()  # Put keyboard focus on button1

        button_name = "Cancel"

        self.button2 = Button(self.myContainer1,
                              command=lambda
                                  arg1=button_name, arg2=2, arg3="Bad  stuff!":
                              self.buttonHandler(arg1, arg2, arg3)
                              )

        self.button2.bind("<Return>",
                          lambda
                              event, arg1=button_name, arg2=2, arg3="Bad  stuff!":
                          self.buttonHandler(arg1, arg2, arg3)
                          )

        self.button2.configure(text=button_name, background="red")
        self.button2.pack(side=LEFT)

    def buttonHandler_a(self, event, argument1, argument2, argument3):
        print
        "buttonHandler_a received event", event
        self.buttonHandler(argument1, argument2, argument3)


root = Tk()
myapp = MyApp(root)
root.mainloop()