I couldn't find the correct syntax to call database element from gdb with python syntax. I've an elements.gdb and want to call my elements with python and if i'm not remembering false, this can be done via python.
Are you referring object classes (featureclasses, tables, etc) in the file geodatabase or are these elements related to "Esri Production Mapping". If it is mainly a Python question you may be better off moving this thread to the Python space.
In case you want to list the content of the file geodatabase you can check this page: Create lists of data—Help | ArcGIS for Desktop
Indeed, as mentioned at documentation Database elements—Help | ArcGIS for Desktop there are elements like north arrow, scale bar etc. at elements.gdb and just i want to add them to layout with the help of the python, not with tool for every mxd. Database elements are under production mapping solution and i think it's a very general feature.