I guess I am hitting the same error as Itison:

File "<string>", line 16

    Test.assert_equals(namelist([{'name': 'Bart'},{'name': 'Lisa'},{'name': 'Maggie'},{'name': 'Homer'},{'name': 'Marge'}]), 'Bart, Lisa,
Maggie, Homer & Marge',
               ^
SyntaxError: invalid syntax

Trying to get the right formatting ... not sure if it points to the & or the space behind.