Socket TCP server + mySQL

#!/usr/bin/env python3
import socket
from _thread import start_new_thread
from datetime import datetime, timedelta
import mysql
 
connMysql = mysql.getConnection()
 
def threaded(c, addr):
 
    global connMysql
    sn = 123
    oneRow = mysql.selectOne(connMysql, "Select * from base where `sn` = %s LIMIT 1", sn)
    print(oneRow)
    c.close()
 
host = "192.168.0.100"
port = 54444
 
 
def main():
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    s.bind((host, port))
    s.listen(5)
 
    while True:
        sock, addr = s.accept()
        print('Connected to :', addr[0], ':', addr[1])
        start_new_thread(threaded, (sock, addr))
 
 
if __name__ == '__main__':
    main()

import pymysql.cursors
 
def getConnection():
    connection = pymysql.connect(host='192.168.0.102',
                                 user='python',
                                 password='python',
                                 db='python',
                                 charset='utf8',
                                 cursorclass=pymysql.cursors.DictCursor)
    return connection
 
 
def selectOne(connMysql, SQL, value):
 
    if connMysql.open:
        cursor = connMysql.cursor()
    else:
        connMysql = getConnection()
        cursor = connMysql.cursor()
    cursor.execute(SQL, value)
    return cursor.fetchone()