如何判断python fabric连接是否就绪？

from fabric import Connection

# 创建连接对象
conn = Connection(host='your_host', user='your_user', connect_kwargs={'password': 'your_password'})

# 判断连接是否就绪
if conn.is_connected:
    print("连接已经建立")
else:
    print("连接未建立")

from fabric import Connection
from paramiko import SSHException

# 创建连接对象
conn = Connection(host='your_host', user='your_user', connect_kwargs={'password': 'your_password'})

try:
    # 尝试建立连接
    conn.open()
    print("连接已经建立")
except SSHException:
    print("连接未建立")
finally:
    # 关闭连接
    conn.close()