code: def testMapTypeOperations(self):
      barFeed = yahoofeed.Feed()
      barFeed.addBarsFromCSV(
          FeedTestCase.TestInstrument,
          common.get_data_file_path("orcl-2000-yahoofinance.csv"),
          marketsession.USEquities.getTimezone(),
      )
      for dateTime, bars in barFeed:
          self.assertTrue(FeedTestCase.TestInstrument in bars)
          self.assertFalse(FeedTestCase.TestInstrument not in bars)
          bars[FeedTestCase.TestInstrument]
          with self.assertRaises(KeyError):
              bars["pirulo"]
  
imports: import datetime
  from .None import common
  from .None import barfeed_test
  from .None import feed_test
  from pyalgotrade.utils import dt
  from pyalgotrade.barfeed import yahoofeed
  from pyalgotrade.barfeed import csvfeed
  from pyalgotrade import bar
  from pyalgotrade import marketsession
label_desc: Use image node_id 20 for calling the FeedTestCase obj's underlying member method code with example usage: obj.testMapTypeOperations() without return types