Python3: paramiko 连接中的替代变量

Question

通过使用 iter()，我从 json 文件中获取主机名。我正在尝试通过函数调用将主机名转发给 paramiko connect, exec_command 方法。

但是当将主机名替换为变量时，连接方法将其视为主机名而不是变量。

如何在 paramiko connect 中替换变量？

import paramiko,json
def exec_commands(host_data):
 host_data = host_data
 new_client=paramiko.SSHClient()
 new_client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
 new_client.connect(host_data,username='root',password='password',port=22,timeout=60)
 stdin, stdout, stderr = new_client.exec_command('uptime')
 for i in stdout:
    print(i)
 new_client.close()

with open('server_list.json','r') as f:
    server_list = json.load(f)


for item in server_list:
    print((item['mydev']))
    iterator_var = iter(item['mydev'])
    next(iterator_var)
    exec_commands(next(iterator_var))

和json文件内容如下

[
    {
        "mydev" : ["192.168.56.101","192.168.56.101","192.168.56.101"]
    }
]

错误：

    Traceback (most recent call last):
  File "D:\Personal\Python_code\Logs_Finder\authentication.py", line 30, in <module>
    exec_commands(next(iterator_var))
  File "D:\Personal\Python_code\Logs_Finder\authentication.py", line 16, in exec_commands  new_client.connect(host_data,username='root',password='password',port=22,timeout=60)
  File "C:\Users\rgenupula\AppData\Local\Continuum\Miniconda3\lib\site-packages\paramiko\client.py", line 310, in connect
    retry_on_signal(lambda: sock.connect(addr))
  File "C:\Users\rgenupula\AppData\Local\Continuum\Miniconda3\lib\site-packages\paramiko\util.py", line 276, in retry_on_signal
    return function()
  File "C:\Users\rgenupula\AppData\Local\Continuum\Miniconda3\lib\site-packages\paramiko\client.py", line 310, in <lambda>
    retry_on_signal(lambda: sock.connect(addr))
TimeoutError: [WinError 10060] A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond
[Finished in 26.4s]

如果文字 IP 地址已作为参数传递，则工作正常。

import paramiko,json

client=paramiko.SSHClient()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
client.connect('192.168.56.102',port=22,username='root',password='password',timeout=60)
stdin, stdout, stderr = client.exec_command('uptime')
for i in stdout:
    print(i)
client.close()

Answer 1

当我运行你的代码时，它甚至没有进入 exec_commands。你的next电话对我来说有点意义。

这很好用：

for item in server_list:
    for item2 in item['mydev']:
        exec_commands(item2)

Python3: paramiko 连接中的替代变量

Python3: Substitute variable in paramiko connect

json

iterator

paramiko

python-3.x

python-3.6

如果文字 IP 地址已作为参数传递，则工作正常。