code: def tables_(self) -> list:
          
          if self._check_db() == False:
              return
          try:
              return self._tables()
          except Exception as e:
              self.err(e, "Can not print tables")
docs: Return a list of the existing tables in a database
  
          :return: list of the table names
          :rtype: list
  
          :example: ``tables = ds.tables_()``