I'm doing a little user/password emulator with a super simple visual interface (using Tkinter) and I need to hide the characters when the user is typing his password.
I need to hide them by that kind of dots that all the systems use when you are going to login into somewhere.
Thanks in advance.
TKinter's Entry widget has a show option. If you set this option to a single character (e.g. *), this character is displayed instead of the actual characters. 
If you don't want the asterisk (*) character, you can try the the bullet (•, "\u2022" in Python).
Hiding characters in Python by dots