Python /關閉未定義

Question

我嘗試關注instructions of the scpclient。

我寫了下面的代碼：

import paramiko 
client = paramiko.SSHClient() 
client.load_system_host_keys() 
client.set_missing_host_key_policy(paramiko.WarningPolicy()) 
client.connect("my_ip", username="root", password="password") 
stdin, stdout, stderr = client.exec_command('display version') 
with closing(Write(client.get_transport(), '.')) as scp: 
    scp.send_file("/tmp/myfile", remote_path="/tmp") 
client.close() 

但我得到了以下錯誤：

Traceback (most recent call last): 
    File "ssh.py", line 11, in <module> 
    with closing(Write(client.get_transport(), '.')) as scp: 
NameError: name 'closing' is not defined 

什麼能是什麼原因？

Answer 1

您需要導入它：from contextlib import closing