x=[(4, 'a'), (4,'b'), (3, 'c'), (3,'b'), (3, 'a'), (1,'z')]
print(sorted(x, key=lambda x: (-x[0], x[1])))
eD1bKDQsICdhJyksICg0LCdiJyksICgzLCAnYycpLCAoMywnYicpLCAoMywgJ2EnKSwgKDEsJ3onKV0KcHJpbnQoc29ydGVkKHgsIGtleT1sYW1iZGEgeDogKC14WzBdLCB4WzFdKSkp
[(4, 'a'), (4, 'b'), (3, 'a'), (3, 'b'), (3, 'c'), (1, 'z')]