code: def get_exchanges(exchange_names):
      exchanges = dict()
      for exchange_name in exchange_names:
          exchanges[exchange_name] = get_exchange(exchange_name)
  
      return exchanges
  
file_path: catalyst/catalyst/exchange/utils/factory.py
imports: import os
  from catalyst.constants import LOG_LEVEL
  from catalyst.exchange.ccxt.ccxt_exchange import CCXT
  from catalyst.exchange.exchange_errors import ExchangeAuthEmpty
  from catalyst.exchange.utils.exchange_utils import get_exchange_auth, get_exchange_folder, is_blacklist
  from logbook import Logger
label_desc: Use image node_id 2 for calling a global function with example usage: get_exchanges(exchange_names) and returns: exchanges