Small exercise - store data in MySQL database into redis

#pymysql, json, redis 
#1, connect to the database, find all the data in the database, the cursor type should use pymysql.curosrs.DictCour 
#2, find all the data [ {"id":1,"passwd":"49487dd4f94008a6110275e48ad09448 ","username":"niuhayang","is_admin":1}] 
#3. Loop the list, get the usernamer, use the username as the key 
#4, then convert this small dictionary into json, and save it in it is ok. 
import pymysql,json,redis 
r = redis.Redis(host='118.24.3.40',password='HK139bc&*',db=1,port=6379) 
conn = pymysql.connect(host='118.24.3.40',user ='jxz',passwd='123456',db='jxz',charset='utf8') 
cur = conn.cursor(cursor=pymysql.cursors.DictCursor)#dictionary display 
cur.execute('select * from my_user ;') 
all_data = cur.fetchall() 
for data in all_data: 
   k = data.get('


conn.close()