Thanks Carlos, that worked for me.
Now i'm facing another error:
UnicodeEncodeError: 'ascii' codec can't encode character u'\u0431' in position 43: ordinal not in range(128)
That i hope is related to any unusual character on a policy object name, or to the encoding used on mi linux client.
I'll write here if i find how to solve it.
The syntax i used is:
python export_package.py -m 192.168.10.213 "2016-Septiembre01_1"
Where "2016-Septiembre01_1", is the access layer (policy) name i got from running "show packages", like the "Standard" one.
Thank you!