code: def load(self, files):
          
          suite = unittest.TestSuite()
          for filepath in files:
              if os.path.isdir(filepath):
                  self._find_tests_in_directory(filepath, suite)
              else:
                  suite.addTest(self.load_suite_from_file(filepath))
          return suite
docs: Load any files found into a suite.
  
          Any directories are walked and their files are added as TAP files.
  
          :returns: A ``unittest.TestSuite`` instance