python - 在 Python Paramiko 中捕获 AuthenticationException

Question

import paramiko

host='x.x.x.x'
port=22
username='root'
password='password'

cmd='dmidecode > a' 

ssh=paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(host,port,username,password)
try:
    stdin,stdout,stderr=ssh.exec_command(cmd)
    outlines=stdout.readlines()
    resp=''.join(outlines)
    print(resp)
except paramiko.AuthenticationException as error:
    print "ERROR"

我无法捕获AuthenticationException。谁能建议我任何其他方法来不破坏脚本并只显示错误？

Answer 1

AuthenticationException发生在SSHClient.connect :

Raises: AuthenticationException – if authentication failed

并且您的 SSHClient.connect 调用不在您的 try block 中。

这应该有效:

try:
    ssh.connect(host,port,username,password)
    stdin,stdout,stderr=ssh.exec_command(cmd)
    outlines=stdout.readlines()
    resp=''.join(outlines)
    print(resp)
except paramiko.AuthenticationException as error:
    print "ERROR"