python - Is there a pythonic way to add a file name to absolute path? -

i using sqlite3 database django. learning right now, wanted know best way of adding file name existing path. example django settings.py file:

base_dir = os.path.abspath(os.path.join(os.path.dirname(__file__), os.pardir))  # creating base directory db_name = os.path.join(base_dir, 'database')                                    # adding database name if os.sep != '/':                                                               # cases (bullet-proofing)     db_name.replace(os.sep, '/')                                                # replacing db_name += (os.sep + 'sqlite3db.db')                                            # adding file name manually 

what did in order add name of database file, simple added / , name of file, in case is sqlite3db.db. doing this, because following django tutorial pages @ database setup. there more elegant way of doing this? more pythonic way, because feels hard-coding things. appreciated.

i have not created sqlite3db.db, since in tutorial says created me django.

not sure what's problem can use os.path.join directly file name produce absolute path

os.path.join(db_name, 'sqlite3db.db') 

is you're looking ?