code: def _parse_text_DB(self, s):
          
          dic = self.decode_json_str(s)
          new_dic = {}
          for table_name, (header, rows) in dic.items():
              newl = [{c: ligne[i]
                       for i, c in enumerate(header)} for ligne in rows]
              new_dic[table_name] = newl
          return new_dic
docs: Returns a dict of table interpreted from s.
          s should be Json string encoding a dict { table_name :  [fields_name,...] , [rows,... ] }