code: def do_loadmacros(parser, token):
      
      try:
          tag_name, filename = token.split_contents()
      except ValueError:
          raise template.TemplateSyntaxError(
              "'{0}' tag requires exactly one argument (filename)".format(
                  token.contents.split()[0]))
      if filename[0] in ('"', "'") and filename[-1] == filename[0]:
          filename = filename[1:-1]
      else:
          raise template.TemplateSyntaxError(
              "Malformed argument to the {0} template tag."
              " Argument must be in quotes.".format(tag_name)
          )
      t = get_template(filename)
      try:
          # Works for Django 1.8
          nodelist = t.template.nodelist
      except AttributeError:
          # Works for Django < 1.8
          nodelist = t.nodelist
      macros = nodelist.get_nodes_by_type(DefineMacroNode)
      # make sure the _macros attribute dictionary is instantiated
      # on the parser, then add the macros to it.
      _setup_macros_dict(parser)
      for macro in macros:
          parser._macros[macro.name] = macro
      # pass macros to LoadMacrosNode so that it can
      # resolve the macros template variable kwargs on render
      return LoadMacrosNode(macros)
docs: The function taking a parsed tag and returning
      a LoadMacrosNode object, while also loading the macros
      into the page.