Adding take off and landing into teleop_twist_keyboard.py

edit

I have successfully sourced and compiled so I can fly my bebop drone using the teleop_twist_keyboard python script.

However I am currently having to run a separate terminal to make the bebop land and take off. Can someone help with how to edit the python script so I can assign the keys 1 ans 2 to mean take off and land respectively.

I have tried various combinations none with any luck (in addition to the original teleop twist keyboard script)

def takeoff():
   pub = rospy.Publisher("bebop/takeoff", Empty, queue_size=10 )
   rospy.init_node('takeoff', anonymous=True)
   rate = rospy.Rate(10) # 10hz
   while not rospy.is_shutdown():
       pub.publish(Empty())
       rate.sleep()

if __name__ == '__main__':
   try:
       takeoff()
   except rospy.ROSInterruptException:
       pass

def land():
   pub = rospy.Publisher("ardrone/land", Empty, queue_size=10 )
   rospy.init_node('land', anonymous=True)
   rate = rospy.Rate(10) # 10hz
   while not rospy.is_shutdown():
       pub.publish(Empty())
       rate.sleep()

if __name__ == '__main__':
   try:
       land()
   except rospy.ROSInterruptException:
       pass
1= takeoff()
2= land()

(didnt expect this one to work )Also tried:

moveBindings = {
        'i':(1,0,0,0),
        'o':(1,0,0,-1),
        'j':(0,0,0,1),
        'l':(0,0,0,-1),
        'u':(1,0,0,1),
        ',':(-1,0,0,0),
        '.':(-1,0,0,1),
        'm':(-1,0,0,-1),
        'O':(1,-1,0,0),
        'I':(1,0,0,0),
        'J':(0,1,0,0),
        'L':(0,-1,0,0),
        'U':(1,1,0,0),
        '<':(-1,0,0,0),
        '>':(-1,-1,0,0),
        'M':(-1,1,0,0),
        't':(0,0,1,0),
        'b':(0,0,-1,0),
        '1'= rostopic pub --once [namespace]/takeoff std_msgs/Empty,
        '2'= rostopic pub --once [namespace]/land std_msgs/Empty  }`enter code here`