A kdyz tam hodis: ?
import datetime
maintenant = datetime . datetime . maintenant ()
maintenant . strftime ( '% Y /% m /% d% H:% M:% S.% f' ) [: - 3 ]
-3 je na odelani poslednich 3 chrakteru.Nebo by to alespon melo sedet : https://docs.python.org/2/library/datetime.html#st rftime-strptime-behavior