code: def import_string(dotted_path):
      
      try:
          module_path, class_name = dotted_path.rsplit('.', 1)
      except ValueError:
          raise ImportError('%s doesn\'t look like a valid path' % dotted_path)
  
      module = __import__(module_path, fromlist=[class_name])
  
      try:
          return getattr(module, class_name)
      except AttributeError:
          msg = 'Module "%s" does not define a "%s" attribute/class' % (
              dotted_path, class_name)
          raise ImportError(msg)
docs: Import a dotted module path.
  
      Returns the attribute/class designated by the last name in the path.
  
      Raises ImportError if the import fails.