code: def run(self):
          
          if not self.scent or len(self.scent.runners) == 0:
              print("Did not find 'scent.py', running nose:")
              return super(ScentSniffer, self).run()
          else:
              print("Using scent:")
              arguments = [sys.argv[0]] + list(self.test_args)
              return self.scent.run(arguments)
          return True
docs: Runs the CWD's scent file.