如果在python shell中手动输入命令，则paramiko脚本可以正常工作

Question

I have a simple python script which uses paramiko module to ssh login to a ubuntu PC and turn it off.

The problem is the script doesn't work, whereas if the commands are typed manually into the python interpreter, the commands work as intended, the remote PC shuts down.

here is my code

#!/usr/bin/python3

import paramiko, subprocess
remote_ip=''
remote_user=''
remote_password=''
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(remote_ip, username = remote_user, password = remote_password,look_for_keys = False, allow_agent = False)
stdin, stdout, stderr = ssh.exec_command('sudo poweroff', get_pty = True)
stdin.write(remote_password+'\n')
stdin.flush()
ssh.close()
print(stdout.readlines())
print(stderr.readlines())

Answer 1

I figured out the solution, but i don't know why it works. I removed the ssh.close() line, and now the script works as intended. It will be helpful if someone could explain this.