code: def init_class_fixtures(cls):
      super(TestFixedReturns, cls).init_class_fixtures()
  
      cls.equity = cls.asset_finder.retrieve_asset(
          cls.asset_finder.equities_sids[0],
      )
      cls.future = cls.asset_finder.retrieve_asset(
          cls.asset_finder.futures_sids[0],
      )
  
      cls.equity_minutes = pd.Index(
          cls.trading_calendars[Equity].minutes_for_sessions_in_range(
              cls.START_DATE,
              cls.END_DATE,
          ),
      )
      cls.equity_closes = pd.Index(
          cls.trading_calendars[Equity].session_closes_in_range(
              cls.START_DATE,
              cls.END_DATE,
          ),
      )
      cls.equity_closes.name = None
  
      futures_cal = cls.trading_calendars[Future]
      cls.future_minutes = pd.Index(
          futures_cal.execution_minutes_for_sessions_in_range(
              cls.START_DATE,
              cls.END_DATE,
          ),
      )
      cls.future_closes = pd.Index(
          futures_cal.execution_time_from_close(
              futures_cal.session_closes_in_range(
                  cls.START_DATE,
                  cls.END_DATE,
              ),
          ),
      )
      cls.future_closes.name = None
  
      cls.future_opens = pd.Index(
          futures_cal.execution_time_from_open(
              futures_cal.session_opens_in_range(
                  cls.START_DATE,
                  cls.END_DATE,
              ),
          ),
      )
      cls.future_opens.name = None
  
imports: import unittest
  import numpy
  import pandas
  from zipline import api
  from zipline.assets import Equity, Future
  from zipline.assets.synthetic import make_commodity_future_info
  from zipline.data.data_portal import DataPortal
  from zipline.data.resample import MinuteResampleSessionBarReader
  from zipline.testing import parameter_space, prices_generating_returns, simulate_minutes_for_day
  from zipline.testing.fixtures import WithMakeAlgo, WithConstantEquityMinuteBarData, WithConstantFutureMinuteBarData, WithWerror, ZiplineTestCase
  from zipline.testing.predicates import assert_equal, wildcard
label_desc: Use image node_id 1 for calling the TestFixedReturns obj's underlying member method code with example usage: obj.init_class_fixtures(cls) without return types