python脚本在linux下连接FTP失败，报错：EOFError

【代码】：
#!/usr/lcoal/env python
#-*- coding=utf-8 -*-
from ftplib import FTP
ftp=FTP()
ftp.set_debuglevel(2)
ftp.connect("172.20.10.203","22")
ftplogin("root","111111")
print ftp.getwelcome("connect success")
【报错】：
[root@198 python]# python test1.py
*get* 'SSH-2.0-OpenSSH_5.3\r\n'
*get* ''
Traceback (most recent call last):
File "test1.py", line 6, in
ftp.connect("172.20.10.198","22")
File "/usr/lib64/python2.6/ftplib.py", line 134, in connect
self.welcome = self.getresp()
File "/usr/lib64/python2.6/ftplib.py", line 209, in getresp
resp = self.getmultiline()
File "/usr/lib64/python2.6/ftplib.py", line 199, in getmultiline
nextline = self.getline()
File "/usr/lib64/python2.6/ftplib.py", line 185, in getline
if not line: raise EOFError
EOFError

Errno 10060是连接超时的错误代码。
2种可能：网络不通 或者 192.168.0.1的21端口上没有开启ftp服务

不明白啊 = =！

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