code: def assignrepr(self, prefix: str = '') -> str:
          
          lines = ['%sNode("%s", variable="%s",'
                   % (prefix, self.name, self.variable)]
          if self.keywords:
              subprefix = '%skeywords=' % (' '*(len(prefix)+5))
              with objecttools.repr_.preserve_strings(True):
                  with objecttools.assignrepr_tuple.always_bracketed(False):
                      line = objecttools.assignrepr_list(
                          sorted(self.keywords), subprefix, width=70)
              lines.append(line + ',')
          lines[-1] = lines[-1][:-1]+')'
          return '\n'.join(lines)
docs: Return a |repr| string with a prefixed assignment.