python 中使用paramiko简单连接

在paramiko中使用用户名和密码通过sftp传输文件，不使用key文件。
import getpass
import select
import socket
import traceback
import paramiko
def putfile():
#import interactive
# setup logging
paramiko.util.log_to_file('demo.log')
username = username
hostname = hostname
port = 22
# now connect
try:
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect((hostname, port))
except Exception, e:
print '*** Connect failed: ' + str(e)
traceback.print_exc()
sys.exit(1)
t = paramiko.Transport(sock)
try:
t.start_client()
except paramiko.SSHException:
print '*** SSH negotiation failed.'
sys.exit(1)
keys = {}
# check server's host key -- this is important.
key = t.get_remote_server_key()
# get username
t.auth_password(username, password)
sftp = paramiko.SFTPClient.from_transport(t)
# dirlist on remote host
d=datetime.date.today()-datetime.timedelta(1)
sftp.put(localFile,serverFile)
t.close() 
sftp.put是可以直接使用目录和文件名，如果有同名文件文件将覆盖