Python List object attribute append is read-only
To append something to a list, you need to call the
As youve seen, assigning to the append method results in an exception as you shouldnt be replacing methods on builtin objects — (If you want to modify a builtin type, the supported way to do that is via subclassing).
or you could modify the same list slot by doing:
passwords[passwords.index(mrjoeadmin)] = Choice13