code: def exchange_order(self, asset, amount, style=None):
      exchange = self.exchanges[asset.exchange]
      return exchange.order(asset, amount, style)
  
imports: import numpy
  import pandas
  from logbook import Logger
  from redo import retry
  from catalyst.assets._assets import TradingPair
  from catalyst.constants import LOG_LEVEL
  from catalyst.exchange.exchange_errors import ExchangeRequestError
  from catalyst.finance.blotter import Blotter
  from catalyst.finance.commission import CommissionModel
  from catalyst.finance.order import ORDER_STATUS
  from catalyst.finance.slippage import SlippageModel
  from catalyst.finance.transaction import create_transaction
  from catalyst.utils.input_validation import expect_types
label_desc: Use image node_id 2 for calling the ExchangeBlotter obj's underlying member method code with example usage: obj.exchange_order(asset, amount, style) and returns: exchange