code: def _find_parent_path_names(self):
          
          parent, dot, me = self._name.rpartition('.')
          if dot == '':
              # This is a top-level module. sys.path contains the parent path.
              return 'sys', 'path'
          # Not a top-level module. parent-module.__path__ contains the
          #  parent path.
          return parent, '__path__'
docs: Returns a tuple of (parent-module-name, parent-path-attr-name)