code: def __init__(self, bts_minute):
      self.bts_minute = bts_minute
  
imports: import pandas
  from zipline.gens.sim_engine import BEFORE_TRADING_START_BAR
  from zipline.finance.asset_restrictions import NoRestrictions
  from zipline.finance import metrics
  from zipline.finance.trading import SimulationParameters
  from zipline.gens.tradesimulation import AlgorithmSimulator
  from zipline.testing.core import parameter_space
  import zipline.testing.fixtures
label_desc: Use image node_id 1 to create a new BeforeTradingStartsOnlyClock object from inherited base classes: object with example: obj = BeforeTradingStartsOnlyClock(bts_minute)