Getting the sender widget's name in function (Tkinter)

[infidel]

Here's a slight variation of tiissa's solution that gives the callable
a reference to the actual widget instead of just it's name:

from Tkinter import Tk, Button

class say_hello:
    def __init__(self, widget):
        self.widget = widget
    def __call__(self):
        print 'Hello,', self.widget['text']

def run():
    root = Tk()
    b1 = Button(root, text='Button 1')
    b1.configure(command=say_hello(b1))
    b1.pack()
    b2 = Button(root, text='Button 2')
    b2.configure(command=say_hello(b2))
    b2.pack()
    root.mainloop()

run()