python 連接操作 mysql（數據庫）

整理思路

1.導入from pymysql import *

（下載pymsql，終端中輸入pip3 install pymysql）

2.建立類，和函數根據已經創建過的數據庫和優化後coding

class JD(object):
    def __init__(self):
        # 創建Connection連接

        self.conn = connect(

host='localhost',

port=3306,

database='jing_dong',

user='root',

password='mysql',

charset='utf8')

        # 獲得Cursor對象
        self.csl = self.conn.cursor()
    def __del__(self):
        # 關閉
        self.csl.close()
        self.conn.close()
    def execute_sql(self,sql):
        self.csl.execute(sql)
        for temp in self.csl.fetchall():
            print(temp)
    def show_all_items(self):
        sql = 'select * from goods;'
        self.execute_sql(sql)


    def show_cates(self):
        sql = 'select name from goods_cates;'
        self.execute_sql(sql)

    def show_brands(self):
        sql = 'select name from goods_brands;'
        self.execute_sql(sql)
    def add_brands(self,name):
        # name = input('請輸入要輸入的商品名稱')
        sql = "insert into goods_brands(name) values('%s')" % name
        self.csl.execute(sql)
        self.conn.commit()

    # @staticmethod
    # def print_menu(self):


    def run(self):
        while True:
            print('--京東--')
            print('1.所有的物品')
            print('2.所有的物品分類')
            print('3.所有物品品牌分類')
            print('4.添加物品品牌')
            num = input('請輸入功能對應的序號')
            if num == '1':
                # 所有的物品
                self.show_all_items()
            elif num == '2':
                # 所有的物品分類
                self.show_cates()
            elif num == '3':
                # 3.所有物品品牌分類
                self.show_brands()
            elif num == '4':
                # 3.添加物品品牌
                name = input("請輸入你要添加的商品名稱")
                self.add_brands(name)
            else:
                print('輸入錯誤')


def main():
    # 創建一個京東對象
    jd = JD()
    jd.run()

if __name__ == '__main__':
    main()