from Tkinter import *
root = Tk()
def hello(event):
print 'HI'
text = Text()
text.config(font=('courier', 15, 'normal'))
text.config(width=20, height=12)
text.pack(expand=YES, fill=BOTH)
text.insert(END, 'Lin 1\n\nLin 2\n\nLin 3.\n\n')
text.tag_add('demo', '1.5', '1.7')
text.tag_add('demo', '3.0', '3.3')
text.tag_add('demo', '5.3', '5.7')
text.tag_config('demo', font=('times', 16, 'underline'))
text.tag_bind('demo', '', hello)
root.mainloop()