Question: How do I create an entry box in python tkinter for a phone number which will only allow 1 0 digits to be entered and

How do I create an entry box in python tkinter for a phone number which will only allow

10

digits to be entered and cannot be empty or a error message box will appear when customer selects submit button? Additionally, how to I set a name entry box in python tkinter to allow letters only and cannot be empty?

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