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Installing psychopy on Linux

After trying a lot of stuff, get a lot of different error messages. Now have

python3 psychopyApp.py
04:35:28 PM: Debug: Adding duplicate image handler for 'Windows bitmap file'
04:35:28 PM: Debug: Adding duplicate image handler for 'Windows bitmap file'
04:35:28 PM: Debug: Adding duplicate image handler for 'Windows bitmap file'
[1]    110814 segmentation fault (core dumped)  python3 psychopyApp.py

Any ideas?