launch IGTL Exporter/Importer from a new terminal got error

[xiaosnowqiang]

Hello，smart people in this rosmed group，I have encounted the problem when follw the tutorial steps ，the communication between ROS and Slicer is fine .But i can not rosrun the xxxx.py code. I have post a topic on 3D Slicer discourse,[Here is the link] So far, I haven't solved the problem，Can someone help please.
Best regards,
-Jian