Python sshtunnel-如何验证SSH连接？

使用Python，我如何在以下情况下验证SSH连接是否成功：

server = SSHTunnelForwarder(
    (host_or_ip, 22),
    ssh_username = "ssh_username",
    ssh_private_key = path_to_key,
    remote_bind_address = (another_host_or_ip, 5432)
)

server.start()

---

您可以使用

try except

块来执行此操作

ssh_address_or_host = ...    
ssh_username = ... 
ssh_password = ... 
remote_bind_address = ... 

try:
    with SSHTunnelForwarder(
        ssh_address_or_host = ssh_address_or_host,
        ssh_username = ssh_username,
        ssh_password = ssh_password,
        remote_bind_address = remote_bind_address
        ) as server:
        print("connected")

except Exception as e:
    print("Non connected because: " + e)

---

我用这个来查看隧道是否打开：

server.skip_tunnel_checkup = False
server.start()
server.check_tunnels()
print(server.tunnel_is_up, flush=True)

在日志中，您将看到：

{('0.0.0.0', 44004): True}  # this tunnel is up
{('0.0.0.0', 44004): False}  # this tunnel is not up

---

你好，菜鸟！让我用另一种方式问我的问题。如果我创建了一个SSHTunnelForwarder，启动它，并没有收到任何异常：现在有没有办法验证我是否已成功连接？我目前正在阅读sshtunnelgithub上的_check_tunnel函数，sshtunnel.py，看看它们是如何实现的。我想可能有一种简单的方法来验证连接。“如果我可以执行X，我知道ssh隧道Y已成功建立。”