>>> p = [("Peter", 114, 42, 3467.87),
("Eve", 129, 37, 3100.03),
("Bill", 105, 42, 7239.34),
("Stella", 125,36, 3983.45),
("Eve", 117, 37, 3490.99)]
>>> sorted(p, key = lambda x: x[2])
[('Stella', 125, 36, 3983.45),
('Eve', 129, 37, 3100.03),
('Eve', 117, 37, 3490.99),
('Peter', 114, 42, 3467.87),
('Bill', 105, 42, 7239.34)]
>>> sorted(p, key = lambda x: (x[2], x[1]))
[('Stella', 125, 36, 3983.45),
('Eve', 117, 37, 3490.99),
('Eve', 129, 37, 3100.03),
('Bill', 105, 42, 7239.34),
('Peter', 114, 42, 3467.87)]