Use lambda to generate a call back function for a button

 

from Tkinter import *
from sys import stdout, exit      

widget = Button(None,             
             text='Hello event world', 
             command=(lambda: stdout.write('Hello lambda world\n') or exit()) )
widget.pack()
widget.mainloop()

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Use lambda to generate a call back function for a button : Event « GUI Tk « Python

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