python 版本 2.7

代码：

#-*-coding:utf-8-*-


import os
import time
from ftplib import FTP


#服务器地址
FTP_SERVER='xx.xx.xx.xx'  -- 对应 ftpe服务器地址
USER='用户'
PWD ='密码'
FTP_PATH='/home/xx/xx/'
local_root='e:'+FTP_PATH
DATE= time.strftime('%Y%m%d',time.localtime(time.time()))
print DATE

def isDir(filename):
    try:
        path = filename;
        path.replace('/','\\')
        if os.path.exists(path):
            print '---file exists--'
        else:
            print 'file not exists ',local_root
            os.mkdirs(local_root)        
        return True
    except:
        return False


def ftpconnect():
    ftp=FTP()
    ftp.set_debuglevel(2)
    ftp.connect(FTP_SERVER,21)
    ftp.login(USER,PWD)
    return ftp


def downloadfile():  
    ftp = ftpconnect()    
    print ftp.getwelcome() #显示ftp服务器欢迎信息

    li = ftp.nlst(FTP_PATH)
    print 'ftp: ',li
    for eachfile in li:
        localpath = 'e:'+eachfile
        print '-- open localpath --',localpath
        bufsize = 1024
        isDir(localpath)
        fp = open(localpath,'wb+')
        ftp.retrbinary('RETR '+eachfile,fp.write,bufsize)
        fp.flush()
    
    ftp.set_debuglevel(0) #关闭调试
    fp.close()
    ftp.quit() #退出ftp服务器

if __name__=="__main__":
    downloadfile()