Flask连接数据库

 1 from flask import Flask,jsonify,request
 2 import json
 3 from flask_cors import *
 4 import pymysql
 5 
 6 app = Flask(__name__)
 7 
 8 import contextlib
 9 
10 @contextlib.contextmanager
11 
12 def mysql(host=‘192.168.0.122‘, port=3306, user=‘root‘, passwd=‘我的数据库密码‘, db=‘text1‘,charset=‘utf8‘):
13  conn = pymysql.connect(host=host, port=port, user=user, passwd=passwd, db=db, charset=charset)
14  cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
15  try:
16    yield cursor
17   final
18    conn.commit()
19 19   cursor.close()
20     conn.close()
21 
22  @app.route(‘/aaa‘, methods=[‘GET‘,‘POST‘])
23  @cross_origin()
24  def aaa():
25     data= request.args.get("data")#获取前台json数据
26     temp = json.loads(data)#将json转为字典
27     id=temp[‘id‘]#获取相应的值
28     with mysql() as cursor:
29         print(cursor)
30          row_count = cursor.execute("select * from users where id=%s", (id))
31         row_1 = cursor.fetchone()
32          return "successCallback"+"("+json.dumps(row_1)+")"
33  
34      conn.commit()
35      cursor.close()
36      conn.close()
37  
38  if __name__ == "__main__":
39      app.run(
40      host = ‘0.0.0.0‘,
41      port = 7777,
42     debug = True
43 )