第十一节 python增、删、改操作

 1 import pymysql
 2 
 3 '''
 4 conn.commit() 真正将数据写入数据库
 5 conn.rollback() 取消前面是sql语句操作
 6 '''
 7 class JD():
 8 
 9     def __init__(self):
10         self.conn = pymysql.connect('localhost','root','','python_test')
11         self.cursor = self.conn.cursor()
12         # cursor.close()
13         # conn.close()
14         # cursor.execute('select * from tdb_goods')
15     def sql_exe(self,sql):
16         self.cursor.execute(sql)
17         ret = self.cursor.fetchall()
18         return ret
19 
20     def show_all_item(self):
21         for temp in self.sql_exe('select * from tdb_goods'):
22             print(temp)
23 
24     def show_goods_cate(self):
25         for temp in self.sql_exe('select * from goods_cate'):
26             print(temp)
27 
28     def show_brand_name(self):
29         for temp in self.sql_exe('select * from brand_name'):
30             print(temp)
31 
32     def add_brand_name(self):
33         brandname = input('请输入你要添加的品牌名称:')
34         sql = """insert into brand_name (name) values ("%s")""" % brandname
35         self.cursor.execute(sql)
36         self.conn.commit()
37 
38     @staticmethod
39     def mue():
40         print("......京东商城......")
41         print('1:所有的商品')
42         print('2：所有商品的分类')
43         print('3:所有的商品品牌分类')
44         print('4:添加商品品牌')
45         print('0:关闭商城')
46         return input('请输入功能相对于的序号:')
47 
48     def run(self):
49         while True:
50             num = self.mue()
51             if num == '1':
52                 self.show_all_item()
53             elif num == '2':
54                 self.show_goods_cate()
55             elif num == '3':
56                 self.show_brand_name()
57             elif num == '0':
58                 break
59             elif num == '4':
60                 self.add_brand_name()
61             else:
62                 print('输入有误，请重新输入....')
63         self.cursor.close()
64         self.conn.close()
65 
66 
67 def main():
68     jd = JD()
69     jd.run()