"Travis" guest list name checker (Ziyad Yehia Udemy course)

[jefsummers]

In line 7 you return guest_list, user_name. You are returning a tuple. From IDLE:

>>> foo = "alpha","beta"
>>> print (foo)
('alpha', 'beta')
>>> print (type(foo))
<class 'tuple'>

The tuple contains two items. In the above, they are two strings. In your case they are guest_list and user_name.
For a better description on tuples see https://docs.python.org/3.7/tutorial/dat...-sequences