No module named <my_package>.msg and <mocap>.srv

edit

SOLVED -- UPDATED 14/10/2015

i've followed this tutorial in here. I finally succesfull known node for my_package. Thankyou all. especially ROS developer ^^)b

13/10/2015

Hello there again, after i did success launch again my package with my problem before here . now i got my old problem with python program. I'm not really familiar with python code especially for ROS, so i got confused even after i read this topic problem which solved by reference from here. I still got some confused stuff because now i'm catkinized my friends code from ROS electric (i'm using Indigo), so the directory path maybe got some differences:

• i have all my python code in :

  my_package
   |- bin/
       |- all my code.py
  

  and i change it to :

    my_package
     |- nodes/
         |- all my code.py
  

i don't know is it different or not.. i just got reference it from my another catkin package which including python in folder "nodes". but i read in here. there's folder named "src" and "scripts". am i doing right thing or not?

• in that reference website tutorial, said that This paragraph is only necessary for packages which use rosbuild/rosmake. If the package is using catkin it must not use roslib.load_manifest. so, if i deleted it, is it okay?

• where should i placed my exported python files, if the python code like this :

  import rospy
  import pi_tracker_lib as PTL
  from my_package.msg import Skeleton
  from mocap.srv import *
  import PyKDL as KDL
  from math import copysign
  import time
  

and this is my error in terminal :

    Traceback (most recent call last):
    File "/home/adelleodel/ros/src/my_package/nodes/ZMP_tracker_command.py", line 26, in <module>
     from my_package.msg import Skeleton
    ImportError: No module named my_package.msg
    Traceback (most recent call last):
     File "/home/adelleodel/ros/src/my_package/nodes/ZMP_skelplot2.py", line 47, in <module>
    from mocap.srv import *
    ImportError: No module named mocap.srv
    [tracker_command-1] process has died [pid 5382, exit code 1, cmd /home/adelleodel/ros/src/my_package/nodes/ZMP_tracker_command.py __name:=tracker_command __log:=/home/adelleodel/.ros/log/43be4ef4-8959-11e5-8b17-0185f2817c5b/tracker_command-1.log].
    log file: /home/adelleodel/.ros/log/43be4ef4-8959-11e5-8b17-0185f2817c5b/tracker_command-1*.log
    [ZMP_skelplot-2] process has died [pid 5383, exit code 1, cmd /home/adelleodel/ros/src/my_package/nodes/ZMP_skelplot2.py __name:=ZMP_skelplot __log:=/home/adelleodel/.ros/log/43be4ef4-8959-11e5-8b17-0185f2817c5b/ZMP_skelplot-2.log].
    log file: /home/adelleodel/.ros/log/43be4ef4-8959-11e5-8b17-0185f2817c5b/ZMP_skelplot-2*.log

thankyou for the respond :)

UPDATED

This is CMakeList.txt:

    cmake_minimum_required(VERSION 2.8.3)
    project(my_package)

   find_package(catkin REQUIRED COMPONENTS
   dynamixel_controllers
   dynamixel_driver
   dynamixel_msgs
   geometry_msgs
   joint_state_publisher
   visualization_msgs
   message_generation
   nav_msgs
   openni_tracker
   roscpp
   rospy
   rviz
   std_msgs
   tf
   urdf
   )

  find_package(orocos_kdl REQUIRED)
  find_package(PkgConfig)
  pkg_check_modules(OpenNI REQUIRED libopenni)

  # Find Glut
  find_package(GLUT REQUIRED)

  # Find OpenGL
  find_package(OpenGL REQUIRED) 

  link_directories(
      ${catkin_LIBRARY_DIRS}
      ${orocos_kdl_LIBRARY_DIRS}
      ${OpenNI_LIBRARIES}
      ${GLUT_LIBRARIES}
      ${OPENGL_INCLUDE_DIR}
    )

   find_library(LIBFREENECT_LIBRARY
      NAMES freenect
      PATHS ${LIBFREENECT_LIBRARY_DIRS}
    )

    catkin_package(
       DEPENDS orocos_kdl
    )

    include_directories(${catkin_INCLUDE_DIRS}
                ${OpenNI_INCLUDE_DIRS}
                ${GLUT_INCLUDE_DIRS}
                ${orocos_kdl_INCLUDE_DIRS}
                ${OPENGL_INCLUDE_DIR}
    )

    add_executable(skeleton_tracker2 src/skeleton_tracker.cpp src/KinectController.cpp src/KinectDisplay.cpp)

    target_link_libraries(skeleton_tracker2
      ${catkin_LIBRARIES}
      ${OpenNI_LIBRARIES}
      ${GLUT_LIBRARIES}
      ${OPENGL_LIBRARIES}  
      ${orocos_kdl_LIBRARIES}
    )

    message("DEBUG variable catkin_INCLUDE_DIRS: ${catkin_INCLUDE_DIRS}")
    message("DEBUG variable OpenNI_INCLUDE_DIRS: ${OpenNI_INCLUDE_DIRS}")
    message("DEBUG variable GLUT_INCLUDE_DIRS ...