I took a node from someone, but just the .py file. I'm trying to build the package using catkincreatepackage, but I don't know which one of these packages must be declared.

This is how the script starts:

#!/usr/bin/env python
import rospy
import sys
from std_msgs.msg import String
from std_msgs.msg import Empty
from geometry_msgs.msg import Twist
from ardrone_autonomy.msg import  Navdata


import threading
import tf
import time
from std_msgs.msg import Empty
from nav_msgs.msg import Odometry
from sensor_msgs.msg import Image, CameraInfo, CompressedImage
from cv_bridge import CvBridge, CvBridgeError
import cv2
from geometry_msgs.msg import Twist
from geometry_msgs.msg import PoseStamped

import numpy as np

from states_variables.ARdroneStateVariables import ARdroneStateVariables

Can anyone please help me? I googled a lot but didn't find what I need. I'm using ROS kinetic and Gazebo 7