code: def tradingStatusWS(symbols=None, on_data=None):
      '''https://iextrading.com/developer/docs/#trading-status'''
      symbols = _strToList(symbols)
      sendinit = ({'symbols': symbols, 'channels': ['tradingstatus']},)
      return _stream(_wsURL('deep'), sendinit, on_dataf tradingStatusWS(symbols=None, on_data=None):
      '''https://iextrading.com/developer/docs/#trading-status'''
      symbols = _strToList(symbols)
      sendinit = ({'symbols': symbols, 'channels': ['tradingstatus']},)
      return _stream(_wsURL('deep'), sendinit, on_data)
docs: https://iextrading.com/developer/docs/#trading-status