File "/opt/ros/kinetic/bin/roslaunch", line 34, in <module> - ImportError: No module named roslaunch

Question

getting the following error with ROS Ubuntu 16 lts, when using roslaunch:

File "/opt/ros/kinetic/bin/roslaunch", line 34, in - ImportError: No module named roslaunch

Answer 1

I used the following command: source ./devel/setup.bash