Python on "Calculate Values"

Hi,

I have a cuestion about python expressions on model builder.

Using Calculate Values, Gettime() work great. But Getdatetime() Don't.

i want datetime.timedelta() and datetime.date.today() so i can get tomorrow and yesterday date.

It works on the python dialog but not from "Calculate Values" in the modelbuilder.

Any help, plz.

Regards,


Marcelo Oyuela