dbtables.py 文件源码

def ListTableColumns(self, table):
        """Return a list of columns in the given table.
        [] if the table doesn't exist.
        """
        assert isinstance(table, str)
        if contains_metastrings(table):
            raise ValueError, "bad table name: contains reserved metastrings"

        columnlist_key = _columns_key(table)
        if not getattr(self.db, "has_key")(columnlist_key):
            return []
        pickledcolumnlist = getattr(self.db, "get_bytes",
                self.db.get)(columnlist_key)
        if pickledcolumnlist:
            return pickle.loads(pickledcolumnlist)
        else:
            return []