Creates all necessary tables (only to be used at the first time)

def create_tables(args):
  """Creates all necessary tables (only to be used at the first time)"""

  from bob.db.utils import create_engine_try_nolock
  engine = create_engine_try_nolock(args.type, args.files[0], echo=(args.verbose > 2))
  Base.metadata.create_all(engine)