Python FTPLIB 错误 530 权限被拒绝

我试过下面的脚本:

import os 
from ftplib import FTP 
 
ftp = FTP("ftpsite","myuser", "mypass") 
ftp.login() 
ftp.retrlines("LIST") 
 
ftp.cwd("folderOne") 
ftp.cwd("subFolder") 
 
listing = [] 
ftp.retrlines("LIST", listing.append) 
words = listing[0].split(None, 8) 
filename = words[-1].lstrip() 
 
#download the file 
local_filename = os.path.join(r"C:\example", file) 
lf = open(local_filename, "wb") 
ftp.retrbinary("RETR " + filename, lf.write, 8*1024) 
lf.close() 

但每次我运行脚本时，它都会说:

Traceback (most recent call last): 
  File "C:\User\Desktop\sample\ex.py", line 4, in <module> 
    ftp = FTP("ftpsite", "myuser", "mypass") 
  File "C:\Python27\lib\ftplib.py", line 119, in __init__ 
    self.login(user, passwd, acct) 
  File "C:\Python27\lib\ftplib.py", line 387, in login 
    resp = self.sendcmd('USER ' + user) 
  File "C:\Python27\lib\ftplib.py", line 244, in sendcmd 
    return self.getresp() 
  File "C:\Python27\lib\ftplib.py", line 219, in getresp 
    raise error_perm, resp 
error_perm: 530 Permission denied. 

我不知道 530 Permission Denied 是什么意思。谁能告诉我这是什么意思？

请您参考如下方法:

• 似乎 ftp 服务器允许匿名访问；您不需要传递用户名和密码。
• FTP 构造函数接受主机名(或 IP)，而不是 URL。

import sys 
import os 
from ftplib import FTP 
 
ftp = FTP("ftpsite.com") 
ftp.login() 
ftp.cwd("/ftp/site/directory/") 
 
listing = [] 
ftp.retrlines("LIST", listing.append) 
words = listing[0].split(None, 8) 
filesize = int(words[4]) 
filename = words[-1].lstrip() 
 
class VerboseWriter: 
    def __init__(self, lf, filesize): 
        self.progress = 0 
        self.lf = lf 
        self.filesize = filesize 
    def write(self, data): 
        self.lf.write(data) 
        self.progress += len(data) 
        sys.stdout.write('\r{}/{} ({:.1%})'.format(self.progress, self.filesize, float(self.progress)/self.filesize)) 
        sys.stdout.flush() 
 
#download the file 
with open(os.path.join(r"c:\example", filename), 'wb') as f: 
    ftp.retrbinary("RETR " + filename, VerboseWriter(lf, filesize).write, 8*1024) 
print 
ftp.quit()