python使用pymysql連線資料庫，如果報錯%d format: a number is required, not str，直接把型別改為 %r,表示不管什麼型別的欄位，原樣輸出

例如，我的資料表字段第一個示int型別，插入資料時，我把第一個欄位設定為%d,死活都報錯，最後改為%r,問題解決，真的是浪費時間啊.............................................................................

if __name__ == '__main__':
    with MyConnectionPool() as db:
        db.cursor.execute("select * from review")
        db.conn.commit()
        for row in db.cursor.fetchall():
            print("nid:%d\t created_at:%s\t content:%s\t source:%s" % row)

        insert_sql = "insert into review (nid,created_at,content,source) VALUES (%r,%s,%s,%s)"
        insert_data = [(11,"2020.12.28","內容1","中國"),(22,"2020.12.29","2內容","riben")]
        # db.cursor.executemany(insert_sql,insert_data)
        with MyConnectionPool() as db:
            db.cursor.executemany(insert_sql,insert_data)
            db.conn.commit()
            for row in db.cursor.fetchall():
                print("nid:%d\t created_at:%s\t content:%s\t source:%s" % row)