https://www.v2ex.com/t/298833

s.py

# https://www.v2ex.com/t/298833
from xx import my_get_s
ss = [int(my_get_s()) for i in range(3)]

# dict version
conds = ({1: 1, 2: 2, 3: 5, 4: 9, 5: 7, 6: 8, },  # x
         {1: 1, 2: 6, 3: 6, 4: 8, },              # y
         {1: 8, 2: 5, 3: 2, 4: 7, 5: 3, },        # z
         )
x, y, z = map(lambda d, s: d.get(s, -1), conds, ss)

# tuple version
conds = ((1, 2, 5, 9, 7, 8),  # x
         (1, 6, 6, 8),        # y
         (8, 5, 2, 7, 3),     # z
         )
x, y, z = map(lambda l, s: l[s - 1] if 0 <= s < len(l) else -1, conds, ss)