Comment 2 for bug 912123

y136wang@y136wang-VirtualBox:~/work/Eclipse_workspace/python_test/src$ export SSH_AUTH_SOCK=/tmp/ssh-aqGtVuyQ1583/agent.1583
y136wang@y136wang-VirtualBox:~/work/Eclipse_workspace/python_test/src$ python test.py
out: /root

err:
y136wang@y136wang-VirtualBox:~/work/Eclipse_workspace/python_test/src$ export SSH_AUTH_SOCK=/tmp/keyring-2bBsGe/ssh
y136wang@y136wang-VirtualBox:~/work/Eclipse_workspace/python_test/src$ python test.py
No handlers could be found for logger "paramiko.transport"
Traceback (most recent call last):
  File "test.py", line 20, in <module>
    main()
  File "test.py", line 9, in main
    ssh.connect(ip_addr, username=user, password=passwd)
  File "build/bdist.linux-i686/egg/paramiko/client.py", line 332, in connect
  File "build/bdist.linux-i686/egg/paramiko/client.py", line 493, in _auth
paramiko.SSHException: No existing session
y136wang@y136wang-VirtualBox:~/work/Eclipse_workspace/python_test/src$