import paramiko

local_ip=*********
name=******
pwd=*******

ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(local_ip,username=name,password=pwd)

command="rostopic pub -1 /ardrone/takeoff std_msgs/Empty"
stdin, stdout, stderr = ssh.exec_command(command)

print stdout.read()

******@*****:~$ rostopic pub -1 /ardrone/takeoff std_msgs/Empty
publishing and latching message for 3.0 seconds
******@*****:~$

command="ls"