Always lowercase entry in tkinter

[PeroPuri]

Just rewrite your validator:

def lowercase_letter_entry(P):
   return (P.isalpha() and P.islower()) or P == ""

Thank you it worked great! I'm just a little bit afraid that it could increase the input error since someone could not realize that they are not typing. Is there a way to get the entry with eventual uppercase and then turn it all in lower case? Thank you