code: def asset_db_relative(bundle_name, timestr, db_version=None):
      db_version = (
          ASSET_DB_VERSION if db_version is None else db_version
      )
  
      return bundle_name, timestr, "assets-%d.sqlite" % db_version
  
imports: from collections import namedtuple
  import errno
  import os
  import shutil
  import warnings
  import click
  from logbook import Logger
  import pandas
  from trading_calendars import get_calendar
  from toolz import curry, complement, take
  from ..adjustments import SQLiteAdjustmentReader, SQLiteAdjustmentWriter
  from ..bcolz_daily_bars import BcolzDailyBarReader, BcolzDailyBarWriter
  from ..minute_bars import BcolzMinuteBarReader, BcolzMinuteBarWriter
  from zipline.assets import AssetDBWriter, AssetFinder, ASSET_DB_VERSION
  from zipline.assets.asset_db_migrations import downgrade
  from zipline.utils.cache import dataframe_cache, working_dir, working_file
  from zipline.utils.compat import ExitStack, mappingproxy
  from zipline.utils.input_validation import ensure_timestamp, optionally
  import zipline.utils.paths
  from zipline.utils.preprocess import preprocess
label_desc: Use image node_id 10 for calling a global function with example usage: asset_db_relative(bundle_name, timestr, db_version) and returns: bundle_name,  timestr,  unknown