Multiple FTP download using Muliti thread

[johnny]

When I run the following script, with host and password and username
changed, I get the following errors:
raise error_temp, resp
error_temp: 421 Unable to set up secure anonymous FTP

Dose the host should allow 4 simultaneous login at a time?

Justin Ezequiel wrote:
> import ftplib, posixpath, threading
> from TaskQueue import TaskQueue
>
> def worker(tq):
>     while True:
>         host, e = tq.get()
>
>         c = ftplib.FTP(host)
>         c.connect()
>         try:
>             c.login()
>             p = posixpath.basename(e)
>             fp = open(p, 'wb')
>             try: c.retrbinary('RETR %s' % e, fp.write)
>             finally: fp.close()
>         finally: c.close()
>
>         tq.task_done()
>
> if __name__ == '__main__':
>     q = TaskQueue()
>     host = 'ftp.microsoft.com'
>
>     c = ftplib.FTP(host)
>     c.connect()
>     try:
>         c.login()
>         folder = '/deskapps/kids/'
>         for n in c.nlst(folder):
>             if n.lower().endswith('.exe'):
>                 q.put((host, n))
>     finally: c.close()
>
>     numworkers = 4
>     for i in range(numworkers):
>         t = threading.Thread(target=worker, args=(q,))
>         t.setDaemon(True)
>         t.start()
> 
>     q.join()
>     print 'Done.'