How do I work with dates in python?

Hi, my question is how can I offer control to the user to enter a date in PYTHON that is not a simple Entry with gray text ... in plan "Ejemplo: 27/10/2014" or "dd/mm/yyyy" . Like there is something similar to a calendar or other element that helps the user to enter a date.

Thanks, regards.

I'm working with the TKINTER bookstore.