how can i asssign a buttons label to an entry in python when the button is clicked?

[shiroonjuguna]

am trying to give functionality to calculator buttons.that is, when i click the button like button with label 7, the letter 7 should appear in an entry.

[bvdet]

Assign a command to your button. The command could concatenate the current contents of the entry widget with the label of the button.

[dwblas]

See the first example at http://effbot.org/tkinterbook/button.htm which shows how to connect a function to a button click. Instead of a print, you would (sometimes delete first and) insert into the Entry like the first example at http://effbot.org/tkinterbook/entry.htm