code: def has_bundle(exchange_name, data_frequency):
      exchange_folder = get_exchange_folder(exchange_name)
  
      folder_name = "{}_bundle".format(data_frequency.lower())
      folder = os.path.join(exchange_folder, folder_name)
  
      return os.path.isdir(folder)
  
imports: import hashlib
  import json
  import os
  import pickle
  import shutil
  from datetime import date, datetime
  import pandas
  from catalyst.assets._assets import TradingPair
  from six import string_types
  from six.moves.urllib import request
  from catalyst.constants import DATE_FORMAT, SYMBOLS_URL
  from catalyst.exchange.exchange_errors import ExchangeSymbolsNotFound
  from catalyst.exchange.utils.serialization_utils import ExchangeJSONEncoder, ExchangeJSONDecoder
  from catalyst.utils.memoize import weak_lru_cache
  from catalyst.utils.paths import data_root, ensure_directory, last_modified_time
label_desc: Use image node_id 22 for calling a global function with example usage: has_bundle(exchange_name, data_frequency) and returns: os