1.安装MySQLdb

pip install MySQLdb

2.代码

1. import MySQLdb
   
3. class MysqlSearch(object):
5.     def __init__(self):
6.         self.get_conn()
8.     def get_conn(self):
9.         try:
10.             self.conn = MySQLdb.connect(
11.                 host=‘127.0.0.1’,
12.                 user=‘root’,
13.                 passwd=‘root’,
14.                 db=‘test’,
15.                 port=3308,
16.                 charset=‘utf8’
17.             )
18.         except MySQLdb.Error as e:
19.             print(‘Error: %s’ % e)
21.     def close_conn(self):
22.         try:
23.             if self.conn:
24.                 # 关闭链接
25.                 self.conn.close()
26.         except MySQLdb.Error as e:
27.             print(‘Error: %s’ % e)
29.     def get_one(self):
30.         # 准备SQL
31.         sql = ‘SELECT * FROM `news` WHERE `types` = %s ORDER BY `created_at` DESC;’
32.         # 找到cursor
33.         cursor = self.conn.cursor()
34.         # 执行SQL
35.         cursor.execute(sql, (‘百家’, ))
36.         # print(dir(cursor))
37.         # 拿到结果
38.         rest = dict(zip([k[0] for k in cursor.description], cursor.fetchone()))
39.         # 处理数据
40.         # 关闭cursor/链接
41.         cursor.close()
42.         self.close_conn()
43.         return rest
45.     def get_more(self):
46.         # 准备SQL
47.         sql = ‘SELECT * FROM `news` WHERE `types` = %s ORDER BY `created_at` DESC;’
48.         # 找到cursor
49.         cursor = self.conn.cursor()
50.         # 执行SQL
51.         cursor.execute(sql, (‘百家’, ))
52.         # print(dir(cursor))
53.         # 拿到结果
54.         rest = [dict(zip([k[0] for k in cursor.description], row))
55.             for row in cursor.fetchall()]
56.         # 处理数据
57.         # 关闭cursor/链接
58.         cursor.close()
59.         self.close_conn()
60.         return rest
62.     def get_more_by_page(self, page, page_size):
63.         ”‘ 分页查询数据 ‘”
64.         offset = (page – 1) * page_size
65.         # 准备SQL
66.         sql = ‘SELECT * FROM `news` WHERE `types` = %s ORDER BY `created_at` DESC LIMIT %s, %s;’
67.         # 找到cursor
68.         cursor = self.conn.cursor()
69.         # 执行SQL
70.         cursor.execute(sql, (‘百家’, offset, page_size))
71.         # print(dir(cursor))
72.         # 拿到结果
73.         rest = [dict(zip([k[0] for k in cursor.description], row))
74.             for row in cursor.fetchall()]
75.         # 处理数据
76.         # 关闭cursor/链接
77.         cursor.close()
78.         self.close_conn()
79.         return rest
81.     def add_one(self):
82.         ”‘ 插入数据 ‘”
83.         # 受影响的行数
84.         row_count = 0
85.         try:
86.             # 准备SQL
87.             sql = (
88.                 “INSERT INTO `news`(`title`,`image`, `content`, `types`, `is_valid`) VALUE”
89.                 “(%s, %s, %s, %s, %s);”
90.             )
91.             # 获取链接和cursor
92.             cursor = self.conn.cursor()
93.             # 执行sql
94.             # 提交数据到数据库
95.             cursor.execute(sql, (‘标题11’, ‘/static/img/news/01.png’, ‘新闻内容5’, ‘推荐’, 1))
96.             # cursor.execute(sql, (‘标题12’, ‘/static/img/news/01.png’, ‘新闻内容6’, ‘推荐’, 1))
97.             # 提交事务
98.             self.conn.commit()
99.         except :
100.             print(‘error’)
101.             # 回滚事务
102.             self.conn.rollback()
103.         # 执行最后一条SQL影响的行数
104.         row_count = cursor.rowcount
105.         # 关闭cursor和链接
106.         cursor.close()
107.         self.close_conn()
108.         # row_count > 0 表示成功
109.         return row_count > 0
113. def main():
114.     obj = MysqlSearch()
115.     # rest = obj.get_one()
116.     # print(rest[‘title’])
118.     # rest = obj.get_more()
119.     # for item in rest:
120.     # print(item)
121.     # print(‘——‘)
123.     # rest = obj.get_more_by_page(2, 3)
124.     # for item in rest:
125.     # print(item)
126.     # print(‘——‘)
128.     rest = obj.add_one()
129.     print(rest)
132. if __name__ == ‘__main__’:
133.     main()