我有以下函数将dataframe插入postgres表：

def insert(conn, df, table, return_field_list):
        tuples = [tuple(x) for x in df.to_numpy()]
        cols = ','.join(list(df.columns))
        query  = "INSERT INTO {} ({}) VALUES (%%s)".format(table, cols)
        sub_stmt = ' RETURNING {} '.format(' ,'.join(return_field_list))
        query += sub_stmt
        cursor = conn.cursor()
        try:
            extras.execute_values(cursor, query, tuples)
            conn.commit()
            return cursor.fetchall()
        except (Exception, psycopg2.DatabaseError) as error:
            print("Error: %s" % error)
            conn.rollback()
            cursor.close()
            return None
        finally:
            if cursor is not None:
                cursor.close()

我的一些表列包含特殊字符，例如“Ni[%{wt}]”，S[%{wt}]在将其传递给上面的函数之前，我用双引号“转义”了dataframe列（除了id和name列）：

df.rename(columns = lambda col: f'"{col}"' if col not in ('id', 'name') else col, inplace=True)

但是，该函数返回以下错误：

Error: unsupported format character: '{'