贴一段代码

#!/bin/env python
import MySQLdb
import socket
import commands
choose=0
user=raw_input('input username:')
passwd=raw_input('input passwd:')
def Main():
    s=socket.socket(AF_INET,SOCK_STREAM)
    s.bind('192.168.137.102',50005)
    s.listen(2)
    con,addr=s.accept()
    commands.getoutput('systemctl start vsftpd')
    data=(1024)

def Check():
    print '''
        Welcome FTP Server!
        1. Get File
        2. Put File
        3. Show Files
        4. Exit
        '''
    choose=raw_input('Input you choose:')
    if choose not in range(1,6):
        print "Input right choose(1~5)"
    else:
        Main()
def Mysql():
    conn=MySQLdb.connect(host='localhost',user='root',passwd='westos',port=3306)          ##首先通过MySQLdb模块，连接Mysql。
    cur=conn.cursor()                ##获取执行工具
    cur.execute('select user,password from ftp.user')                    ##执行语句，返回受影响的行数
    check=cur.fetchall()     ##将上个执行语句的结果返回
    for i in range(len(check)):
        if user in check[i][0]:
            if passwd == check[i][1]:
                Check()
            else:
                print 'Password are wrong!'
        else:
            print "Username are wrong!"
    conn.commit()       ##将执行的结果保存至mysql
    cur.close()           ##从内存中释放
    conn.close()       ##从内存中释放

Mysql()