code: def __init__(self, barFeed, cash_or_brk=1000000):
      super(BacktestingStrategy, self).__init__(barFeed, cash_or_brk)
  
imports: import datetime
  from pyalgotrade import strategy
label_desc: Use image node_id 1 to create a new BacktestingStrategy object from inherited base classes: TestStrategyMixin, strategy with example: obj = BacktestingStrategy(barFeed, cash_or_brk)