python root权限删除服务器文件

#coding:utf-8
import paramiko
"""
    删除文件 root权限
"""

ssh=paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(hostname="192.168.1.37",port=22,username="test",password="test")
stdin,stdout,stderr=ssh.exec_command('sudo -i rm -f /a.txt',get_pty=True)
stdin.write("test\n")
# stdin.write("\n")
stdin.close()
print(stderr.read())
ssh.close()