我正在編寫一個(gè)腳本，將 csv 文件讀取到 psql 表，然后對(duì)數(shù)據(jù)進(jìn)行排序并將其導(dǎo)出到一個(gè)新文件。如何將導(dǎo)出到 csv 文件的相同數(shù)據(jù)打印到終端以將其顯示為表格？這是我的代碼：import psycopg2import pandas as pdclass Products(object):    def __init__(self):        self.db_connection = psycopg2.connect("host=localhost dbname=rd_assignment user=postgres")        self.db_cur = self.db_connection.cursor()    def add_column(self):        """This method adds a column to the products database table. It checks if the table is empty before        inserting the csv file."""        self.db_cur.execute("ALTER TABLE products ADD COLUMN IF NOT EXISTS is_active BOOLEAN NOT NULL;")        self.db_cur.execute("SELECT COUNT(*) FROM products;")        rows = self.db_cur.fetchall()        if rows[0][0] < 20:            self.db_cur.execute(                "COPY products FROM '/Users/leroy/PycharmProjects/rd_assignment/products.csv' DELIMITERS ',' CSV;")            self.db_connection.commit()    def sort_highest(self):        """This method outputs the products to a csv file according to the highest amount"""        sort_highest = "COPY (SELECT * FROM products order by amount desc) TO STDOUT DELIMITER ';' CSV HEADER"        with open("highest_amount.csv", "w") as file:            self.db_cur.copy_expert(sort_highest, file)        r = pd.read_csv('/Users/leroy/PycharmProjects/rd_assignment/highest_amount.csv')        print(r.head(20))    def get_active(self):        """This method outputs the active products in the database to a csv file"""        sort_active = "COPY (SELECT * FROM products WHERE is_active = True) TO STDOUT DELIMITER ';' CSV HEADER"        with open("active_products.csv", "w") as file:            self.db_cur.copy_expert(sort_active, file)