code: def init_instance_fixtures(self):
      super(TestRisk, self).init_instance_fixtures()
      self.start_session = pd.Timestamp("2006-01-01", tz="UTC")
      self.end_session = self.trading_calendar.minute_to_session_label(
          pd.Timestamp("2006-12-31", tz="UTC"), direction="previous"
      )
      self.sim_params = SimulationParameters(
          start_session=self.start_session,
          end_session=self.end_session,
          trading_calendar=self.trading_calendar,
      )
      self.algo_returns = factory.create_returns_from_list(
          RETURNS, self.sim_params
      )
      self.benchmark_returns = factory.create_returns_from_list(
          BENCHMARK, self.sim_params
      )
      self.metrics = ClassicRiskMetrics.risk_report(
          algorithm_returns=self.algo_returns,
          benchmark_returns=self.benchmark_returns,
          algorithm_leverages=pd.Series(
              0.0, index=self.algo_returns.index
          ),
      )
  
imports: import datetime
  import pandas
  import numpy
  from zipline.utils import factory
  from zipline.finance.trading import SimulationParameters
  import zipline.testing.fixtures
  from zipline.finance.metrics import _ClassicRiskMetrics
label_desc: Use image node_id 1 for calling the TestRisk obj's underlying member method code with example usage: obj.init_instance_fixtures() without return types