Python download by ftp

from ftplib import FTP
 
print 'Opening ftp connection'
ftp = FTP('10.1.2.3')
ftp.set_pasv(False)
ftp.login(user='asdfasdfsdfa', passwd = 'asdasdf')
print('login good')
ftp.cwd('/export/')
 
 
data =[]
ftp.dir(data.append)
 
 
for line in data:
    print  "-",line
ftp.retrbinary('RETR ' + 'rates.txt',open('bates.txt','wb').write)
ftp.quit()