创建一个存储过程

CREATE OR REPLACE PROCEDURE get_order_count(
    salesman_code NUMBER, 
    year NUMBER,
    order_count OUT NUMBER)
IS     
BEGIN     
    SELECT 
        COUNT(*) INTO order_count  
    FROM orders 
    WHERE salesman_id = salesman_code AND
        EXTRACT(YEAR FROM order_date) = year;
EXCEPTION
    WHEN OTHERS THEN
        dbms_output.put_line(sqlerrm);
END;  

调用存储过程的函数

import cx_Oracle
import config as cfg


def get_order_count(salesman_id, year):
    """
    Get order count by salesman and year
    :param salesman_id:
    :param year:
    :return: the number of orders by a salesman and year
    """
    try:
        # create a connection to the Oracle Database
        with cx_Oracle.connect(cfg.username,
                            cfg.password,
                            cfg.dsn,
                            encoding=cfg.encoding) as connection:
            # create a new cursor
            with connection.cursor() as cursor:
                # create a new variable to hold the value of the
                # OUT parameter
                order_count = cursor.var(int)
                # call the stored procedure
                cursor.callproc('get_order_count',
                                [salesman_id, year, order_count])
                return order_count.getvalue()
    except cx_Oracle.Error as error:
        print(error)


if __name__ == '__main__':
    orders = get_order_count(54, 2017)
    print(orders)  # 3

配置信息

username = 'OT'
password = '<password>'
dsn = 'localhost/pdborcl'
port = 1512
encoding = 'UTF-8'

参考
https://www.oracletutorial.com/python-oracle/calling-a-plsql-procedure-in-python/