Python多线程存取MySQL数据
这两天正好接触python对sql的多线程问题，于是写了个demo以供参考。
首先安装MySQLdb，指令是：pip install mysql-python
1.存入数据：
1 import MySQLdb 2 import datetime 3 import time 4 def insert(io): 5 while True: 6 time_now = datetime.datetime.now() 7 print io,time_now 8 conn = MySQLdb.connect(user = "root", passwd = "qwe123", host = "192.2.4.166", db = "python") 9 cur = conn.cursor() 10 sql = "insert into table_%s values ('%s','%s');" 11 cur.execute(sql%(io,io,time_now)) 12 cur.close() 13 conn.commit() 14 time.sleep(5) 15 16 if __name__ == "__main__": 17 import threading 18 t = threading.Thread(target=insert,args=('in',)) 19 t.start() 20 t = threading.Thread(target=insert,args=('out',)) 21 t.start() 22 t.join()
2.读取数据：
1 #coding *.* coding: utf-8 *.* 2 import MySQLdb 3 import time 4 conn = MySQLdb.connect( 5 host = "192.2.4.166", 6 port = 3306, 7 user = "root", 8 passwd = 'qwe123', 9 db = 'python', 10 #如果遇到数据库中有中文，加这条 11 charset = "utf8", 12 ) 13 def read(io): 14 list = [0] 15 while True: 16 conn = MySQLdb.connect(user="root", passwd="qwe123", host="192.2.4.166", db="python") 17 # cursorclass 使输出变为字典形式 18 cur = conn.cursor(cursorclass=MySQLdb.cursors.DictCursor) 19 sql = "select * from table_%s order by date desc;" 20 cur.execute(sql % io) 21 info = cur.fetchone() 22 if info not in list: 23 print info 24 list.append(info) 25 list.pop(0) 26 cur.close() 27 conn.commit() 28 time.sleep(2) 29 30 if __name__ == "__main__": 31 import threading 32 t = threading.Thread(target=read, args=('in',)) 33 t.start() 34 t = threading.Thread(target=read, args=('out',)) 35 t.start() 36 t.join()
