gustavo@gustavo:tmp$ time sh lixo 1
SIM

real    0m0.004s
user    0m0.000s
sys     0m0.003s
gustavo@gustavo:tmp$ time lixo.py 
naum eh 10 :( 

real    0m0.014s
user    0m0.009s
sys     0m0.004s
gustavo@gustavo:tmp$