new_contents: import AlphaTwirl
  import unittest
  import inspect
  
  ##__________________________________________________________________||
  hasPandas = False
  try:
      import pandas
      hasPandas = True
  except ImportError:
      pass
  
  
  ##__________________________________________________________________||
  hasROOT = False
  try:
      import ROOT
      hasROOT = True
  except ImportError:
      pass
  
  ##__________________________________________________________________||
  
  class TestImport_01(unittest.TestCase):
  
      @unittest.skipUnless(hasPandas, "has no pandas")
      def test_with_pandas(self):
          self.assertTrue(inspect.isfunction(AlphaTwirl.Aggregate.combine_MC_yields_in_datasets_into_xsec_in_processes))
          self.assertTrue(inspect.isfunction(AlphaTwirl.Aggregate.stack_counts_categories))
          self.assertTrue(inspect.isfunction(AlphaTwirl.Aggregate.sumOverCategories))
  
          self.assertTrue(inspect.isfunction(AlphaTwirl.buildBinningFromTbl))
  
          self.assertTrue(inspect.isclass(AlphaTwirl.CombineIntoPandasDataFrame))
          self.assertTrue(inspect.isclass(AlphaTwirl.WritePandasDataFrameToFile))
  
      @unittest.skipUnless(hasROOT, "has no ROOT")
      def test_with_ROOT(self):
          self.assertTrue(inspect.isclass(AlphaTwirl.HeppyResult.BEventBuilder))
          self.assertTrue(inspect.isclass(AlphaTwirl.HeppyResult.EventBuilder))
  
      def test_functions(self):
          self.assertTrue(inspect.isfunction(AlphaTwirl.mkdir_p))
  
      def test_classes(self):
          self.assertTrue(inspect.isclass(AlphaTwirl.EventReader.Collector))
          self.assertTrue(inspect.isclass(AlphaTwirl.AlphaTwirl))
          self.assertTrue(inspect.isclass(AlphaTwirl.Binning.Binning))
          self.assertTrue(inspect.isclass(AlphaTwirl.Binning.Echo))
          self.assertTrue(inspect.isclass(AlphaTwirl.Binning.Round))
          self.assertTrue(inspect.isclass(AlphaTwirl.Binning.RoundLog))
          self.assertTrue(inspect.isclass(AlphaTwirl.Combine))
          self.assertTrue(inspect.isclass(AlphaTwirl.CombineIntoList))
          self.assertTrue(inspect.isclass(AlphaTwirl.Counter.Counter))
          self.assertTrue(inspect.isclass(AlphaTwirl.Counter.CounterFactory))
          self.assertTrue(inspect.isclass(AlphaTwirl.Counter.Counts))
          self.assertTrue(inspect.isclass(AlphaTwirl.Counter.GenericKeyComposer))
          self.assertTrue(inspect.isclass(AlphaTwirl.Counter.GenericKeyComposerB))
          self.assertTrue(inspect.isclass(AlphaTwirl.Counter.NextKeyComposer))
          self.assertTrue(inspect.isclass(AlphaTwirl.EventReader.Collector))
          self.assertTrue(inspect.isclass(AlphaTwirl.EventReader.EventLoop))
          self.assertTrue(inspect.isclass(AlphaTwirl.EventReader.EventLoopProgressReportWriter))
          self.assertTrue(inspect.isclass(AlphaTwirl.EventReader.EventLoopRunner))
          self.assertTrue(inspect.isclass(AlphaTwirl.EventReader.EventReaderBundle))
          self.assertTrue(inspect.isclass(AlphaTwirl.EventReader.EventReaderCollectorAssociator))
          self.assertTrue(inspect.isclass(AlphaTwirl.EventReader.EventReaderCollectorAssociatorComposite))
          self.assertTrue(inspect.isclass(AlphaTwirl.EventReader.EventReaderComposite))
          self.assertTrue(inspect.isclass(AlphaTwirl.EventReader.MPEventLoopRunner))
          self.assertTrue(inspect.isclass(AlphaTwirl.EventReader.NullProgressMonitor))
          self.assertTrue(inspect.isclass(AlphaTwirl.Events.BEvents))
          self.assertTrue(inspect.isclass(AlphaTwirl.Events.Branch))
          self.assertTrue(inspect.isclass(AlphaTwirl.Events.BranchAddressManager))
          self.assertTrue(inspect.isclass(AlphaTwirl.Events.Events))
          self.assertTrue(inspect.isclass(AlphaTwirl.HeppyResult.Analyzer))
          self.assertTrue(inspect.isclass(AlphaTwirl.HeppyResult.Component))
          self.assertTrue(inspect.isclass(AlphaTwirl.HeppyResult.ComponentLoop))
          self.assertTrue(inspect.isclass(AlphaTwirl.HeppyResult.ComponentReaderComposite))
          self.assertTrue(inspect.isclass(AlphaTwirl.HeppyResult.HeppyResult))
          self.assertTrue(inspect.isclass(AlphaTwirl.HeppyResult.ReadComponentConfig))
          self.assertTrue(inspect.isclass(AlphaTwirl.HeppyResult.ReadCounter))
          self.assertTrue(inspect.isclass(AlphaTwirl.HeppyResult.ReadVersionInfo))
          self.assertTrue(inspect.isclass(AlphaTwirl.HeppyResult.TblCounter))
          self.assertTrue(inspect.isclass(AlphaTwirl.HeppyResult.TblXsec))
          self.assertTrue(inspect.isclass(AlphaTwirl.ProgressBar.ProgressBar))
          self.assertTrue(inspect.isclass(AlphaTwirl.ProgressBar.ProgressMonitor))
          self.assertTrue(inspect.isclass(AlphaTwirl.ProgressBar.ProgressReport))
          self.assertTrue(inspect.isclass(AlphaTwirl.ProgressBar.ProgressReporter))
          self.assertTrue(inspect.isclass(AlphaTwirl.WriteListToFile))
  
  ##________________________________._________________________________||
  
subject: add a new test case TestImport_01