"Failed to process package 'catkin'" when trying to download ROS kinetic

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I'm trying to install ROS kinetic on Ubuntu by following the steps given in this link: http://wiki.ros.org/kinetic/Installat....

When I try entering ./src/catkin/bin/catkin_make_isolated --install -DCMAKE_BUILD_TYPE=Release within ros_catkin_ws, I get the following error. Any help would be greatly appreciated :)

Base path: /home/maggie/ros_catkin_ws
Source space: /home/maggie/ros_catkin_ws/src
Build space: /home/maggie/ros_catkin_ws/build_isolated
Devel space: /home/maggie/ros_catkin_ws/devel_isolated
Install space: /home/maggie/ros_catkin_ws/install_isolated
Additional CMake Arguments: -DCMAKE_BUILD_TYPE=Release
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~  traversing 229 packages in topological order:
~~  - catkin
~~  - genmsg
~~  - gencpp
~~  - geneus
~~  - genlisp
~~  - gennodejs
~~  - genpy
~~  - bond_core
~~  - cmake_modules
~~  - class_loader
~~  - common_msgs
~~  - common_tutorials
~~  - cpp_common
~~  - desktop
~~  - desktop_full
~~  - diagnostics
~~  - eigen_stl_containers
~~  - executive_smach
~~  - gazebo_dev
~~  - gazebo_ros_pkgs
~~  - geometry
~~  - geometry_tutorials
~~  - gl_dependency
~~  - image_common
~~  - image_pipeline
~~  - image_transport_plugins
~~  - laser_pipeline
~~  - media_export
~~  - message_generation
~~  - message_runtime
~~  - mk
~~  - nodelet_core
~~  - octomap (plain cmake)
~~  - opencv3 (plain cmake)
~~  - orocos_kdl (plain cmake)
~~  - perception
~~  - perception_pcl
~~  - python_orocos_kdl (plain cmake)
~~  - qt_dotgraph
~~  - qt_gui
~~  - qt_gui_py_common
~~  - qwt_dependency
~~  - random_numbers
~~  - robot
~~  - robot_model
~~  - ros
~~  - ros_base
~~  - ros_comm
~~  - ros_core
~~  - ros_environment
~~  - ros_tutorials
~~  - rosbag_migration_rule
~~  - rosbash
~~  - rosboost_cfg
~~  - rosbuild
~~  - rosclean
~~  - roscpp_core
~~  - roscpp_traits
~~  - roscreate
~~  - rosgraph
~~  - roslang
~~  - roslint
~~  - roslisp
~~  - rosmake
~~  - rosmaster
~~  - rospack
~~  - roslib
~~  - rosparam
~~  - rospy
~~  - rosservice
~~  - rostime
~~  - roscpp_serialization
~~  - python_qt_binding
~~  - roslaunch
~~  - rosunit
~~  - angles
~~  - rosconsole
~~  - pluginlib
~~  - qt_gui_cpp
~~  - resource_retriever
~~  - rosconsole_bridge
~~  - roslz4
~~  - rosbag_storage
~~  - rostest
~~  - rqt_action
~~  - rqt_bag
~~  - rqt_bag_plugins
~~  - rqt_common_plugins
~~  - rqt_console
~~  - rqt_dep
~~  - rqt_graph
~~  - rqt_gui
~~  - rqt_logger_level
~~  - rqt_moveit
~~  - rqt_msg
~~  - rqt_nav_view
~~  - rqt_plot
~~  - rqt_pose_view
~~  - rqt_publisher
~~  - rqt_py_console
~~  - rqt_robot_dashboard
~~  - rqt_robot_monitor
~~  - rqt_robot_plugins
~~  - rqt_robot_steering
~~  - rqt_runtime_monitor
~~  - rqt_service_caller
~~  - rqt_shell
~~  - rqt_srv
~~  - rqt_tf_tree
~~  - rqt_top
~~  - rqt_topic
~~  - rqt_web
~~  - simulators
~~  - smach
~~  - smclib
~~  - stage (plain cmake)
~~  - std_msgs
~~  - actionlib_msgs
~~  - bond
~~  - diagnostic_msgs
~~  - geometry_msgs
~~  - eigen_conversions
~~  - kdl_conversions
~~  - nav_msgs
~~  - rosgraph_msgs
~~  - rosmsg
~~  - rqt_py_common
~~  - shape_msgs
~~  - smach_msgs
~~  - std_srvs
~~  - tf2_msgs
~~  - tf2
~~  - tf2_eigen
~~  - trajectory_msgs
~~  - control_msgs
~~  - urdf_parser_plugin
~~  - vision_opencv
~~  - visualization_msgs
~~  - geometric_shapes
~~  - visualization_tutorials
~~  - viz
~~  - webkit_dependency
~~  - xmlrpcpp
~~  - roscpp
~~  - bondcpp
~~  - bondpy
~~  - nodelet
~~  - nodelet_tutorial_math
~~  - pluginlib_tutorials
~~  - roscpp_tutorials
~~  - rosout
~~  - camera_calibration
~~  - diagnostic_aggregator
~~  - diagnostic_updater
~~  - diagnostic_common_diagnostics
~~  - dynamic_reconfigure
~~  - filters
~~  - joint_state_publisher
~~  - message_filters
~~  - rosnode
~~  - rospy_tutorials
~~  - rostopic
~~  - roswtf
~~  - rqt_gui_cpp
~~  - rqt_gui_py
~~  - rqt_reconfigure
~~  - self_test
~~  - smach_ros
~~  - tf2_py
~~  - topic_tools
~~  - rosbag
~~  - actionlib
~~  - actionlib_tutorials
~~  - diagnostic_analysis
~~  - nodelet_topic_tools
~~  - rqt_launch
~~  - sensor_msgs
~~  - camera_calibration_parsers
~~  - cv_bridge
~~  - gazebo_msgs
~~  - image_geometry
~~  - image_transport
~~  - camera_info_manager
~~  - compressed_depth_image_transport
~~  - compressed_image_transport
~~  - image_proc
~~  - image_publisher
~~  - map_msgs
~~  - pcl_msgs
~~  - pcl_conversions
~~  - polled_camera
~~  - rqt_image_view
~~  - stereo_msgs
~~  - image_view
~~  - stereo_image_proc
~~  - tf2_ros
~~  - depth_image_proc
~~  - tf
~~  - gazebo_ros
~~  - interactive_markers
~~  - interactive_marker_tutorials
~~  - laser_geometry
~~  - laser_assembler
~~  - laser_filters
~~  - pcl_ros
~~  - stage_ros
~~  - tf2_geometry_msgs
~~  - image_rotate
~~  - tf2_kdl
~~  - tf_conversions
~~  - theora_image_transport
~~  - turtlesim
~~  - turtle_actionlib
~~  - turtle_tf
~~  - turtle_tf2
~~  - urdf
~~  - collada_parser
~~  - collada_urdf
~~  - gazebo_plugins
~~  - kdl_parser
~~  - robot_state_publisher
~~  - rviz
~~  - librviz_tutorial
~~  - rqt_rviz
~~  - rviz_plugin_tutorials
~~  - rviz_python_tutorial
~~  - urdf_tutorial
~~  - visualization_marker_tutorials
~~  - xacro
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

==> Processing catkin package: 'catkin'
==> cmake /home/maggie/ros_catkin_ws/src/catkin -DCATKIN_DEVEL_PREFIX=/home/maggie/ros_catkin_ws/devel_isolated/catkin -DCMAKE_INSTALL_PREFIX=/home/maggie/ros_catkin_ws/install_isolated -DCMAKE_BUILD_TYPE=Release -G Unix Makefiles in '/home/maggie/ros_catkin_ws/build_isolated/catkin'
-- Using CATKIN_DEVEL_PREFIX: /home/maggie/ros_catkin_ws/devel_isolated/catkin
-- Using CMAKE_PREFIX_PATH: 
-- Using PYTHON_EXECUTABLE: /usr/bin/python
-- Using Debian Python package layout
-- Could NOT find PY_em (missing: PY_EM) 
CMake Error at cmake/empy.cmake:29 (message):
  Unable to find either executable 'empy' or Python module 'em'...  try
  installing the package 'python-empy'
Call Stack (most recent call first):
  cmake/all.cmake:164 (include)
  CMakeLists.txt:8 (include)


-- Configuring incomplete, errors occurred!
See also "/home/maggie/ros_catkin_ws/build_isolated/catkin/CMakeFiles/CMakeOutput.log".
<== Failed to process package 'catkin': 
  Command '['cmake', '/home/maggie/ros_catkin_ws/src/catkin', '-DCATKIN_DEVEL_PREFIX=/home/maggie/ros_catkin_ws/devel_isolated/catkin', '-DCMAKE_INSTALL_PREFIX=/home/maggie/ros_catkin_ws/install_isolated', '-DCMAKE_BUILD_TYPE=Release', '-G', 'Unix Makefiles']' returned non-zero exit status 1

Reproduce this error by running:
==> cd /home/maggie/ros_catkin_ws/build_isolated/catkin && cmake /home/maggie/ros_catkin_ws/src/catkin -DCATKIN_DEVEL_PREFIX=/home/maggie/ros_catkin_ws/devel_isolated/catkin -DCMAKE_INSTALL_PREFIX=/home/maggie/ros_catkin_ws ...