Linking external library in ROS Python

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Hi,

I'm trying to add an external python library to my python project in my catkin workspace. The folder structure is not the best but I have my python executable in the /scripts folder along with my library .so files. I then import the library using the standard import statement. It works fine when I run the executable using rosrun but not when I use roslaunch. Using roslaunch, the library is not found when the node runs.

Any ideas on how to tell roslaunch where to find the library?