while loops

[jefsummers]

Indeed, the instructions suggest one loop with exclusion of the bad names as soon as they are entered. But, your example desired output suggests that all names are added and then a second loop goes through that list and does the exclusions.

So which is it?

If the latter, I would build a second list of names from the first, adding a name only if it is not in the bad name list.

good_list = []
for name in users:
    if name not in banned_users:
        good_list.append(name)