code: def testWithoutTimezone(self):
      barFeed = yahoofeed.Feed()
      barFeed.addBarsFromCSV(
          FeedTestCase.TestInstrument,
          common.get_data_file_path("orcl-2000-yahoofinance.csv"),
      )
      barFeed.addBarsFromCSV(
          FeedTestCase.TestInstrument,
          common.get_data_file_path("orcl-2001-yahoofinance.csv"),
      )
      for dateTime, bars in barFeed:
          bar = bars.getBar(FeedTestCase.TestInstrument)
          self.assertTrue(dt.datetime_is_naive(bar.getDateTime()))
  
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 16 for calling the FeedTestCase obj's underlying member method code with example usage: obj.testWithoutTimezone() without return types