Python3:paramiko connect 中的替换变量

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到 paramiko 连接exec_command方法。

但是，在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。

如何在帕拉米科连接中替换变量？

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文件有如下内容

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

错误：

Traceback (most recent call last):
File "D:PersonalPython_codeLogs_Finderauthentication.py", line 30, in <module>
exec_commands(next(iterator_var))
File "D:PersonalPython_codeLogs_Finderauthentication.py", line 16, in exec_commands  new_client.connect(host_data,username='root',password='password',port=22,timeout=60)
File "C:UsersrgenupulaAppDataLocalContinuumMiniconda3libsite-packagesparamikoclient.py", line 310, in connect
retry_on_signal(lambda: sock.connect(addr))
File "C:UsersrgenupulaAppDataLocalContinuumMiniconda3libsite-packagesparamikoutil.py", line 276, in retry_on_signal
return function()
File "C:UsersrgenupulaAppDataLocalContinuumMiniconda3libsite-packagesparamikoclient.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]

如果文本 IP 地址已作为参数传递，则有效。

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

当我运行您的代码时，它甚至无法exec_commands.你的next电话对我来说有点意义。

这工作得很好：

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