SQL query with MariaDB

[vogll]

Hi,
I read more tutorials and try use PyMySQL. I resolv some problems :

- which is the best library for SQL and MariaDB ? (I found MysqlDB, PyMySQL, SQLAlchemy)
- is ORM (SQLAlchemy) usable for simple projects ?
- I need more SQL queries in one program loop (example bellow). Must I use for each query separate connection and cursor or can use one cursor (conenction) ?

       sql = "SELECT * FROM portal WHERE typ_id = "+str(typ)
        self.cursor.execute(sql)
        data = self.cursor.fetchall()
        c = self.cursor.rowcount
        for row in data:
            sql1 = "INSERT INTO values VALUES ('',NOW(),0," + str(row[0]) + ")"
            try:
                self.cursor.execute(sql1)
            except:
                self.db.rollback()