def test_expand_list():
"""
This should return an expanded version of list lst.
"""
lst = [1, 2, 3, [4, 5, 6], 7, (8, 9), ((10, 11), ((12, 13), ))]
assert util.expand_list(lst) == [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]
def test_expand_list():
"""
This should return an expanded version of list lst.
"""
lst = [1, 2, 3, [4, 5, 6], 7, (8, 9)]
assert util.expand_list(lst) == [1, 2, 3, 4, 5, 6, 7, 8, 9]
