Best posts made by klints2

Well, I think found it.
Don't perfect but its works

import c4d
import os
from os.path import join, normpath
from c4d import documents

def export():

    dirpath = "c:/usr/temp/"  # temp directory
    global tdoc
    
    sobj = doc.GetActiveObjects(0)
    # isolate objects
    tdoc = c4d.documents.IsolateObjects(doc, sobj)
   
    # get path with object name
    full_dirpath = normpath(join(dirpath + (doc.GetActiveObjects(0)[0]).GetName() + ".obj"))
   
    # export to obj
    documents.SaveDocument(tdoc,full_dirpath,c4d.SAVEDOCUMENTFLAGS_0,1030178)        

if __name__=='__main__':
    export()

    documents.KillDocument(tdoc)