Error by executing diy_climbing_wall.py

[McBs]

Hey Jan,

I got an error by executing diy_climbing_wall.py.

(base) 10:47:56 climbing-wall-> conda activate climbingwall (climbingwall) 10:48:11 climbing-wall-> python diy_climbing_wall.py Traceback (most recent call last): File "diy_climbing_wall.py", line 170, in <module> display, start_display, add_menu, add_function_to_menu = init_display() File "/Users/mariobedrunka/anaconda3/envs/climbingwall/lib/python3.7/site-packages/OCC/Display/SimpleGui.py", line 77, in init_display used_backend = load_backend(backend_str) File "/Users/mariobedrunka/anaconda3/envs/climbingwall/lib/python3.7/site-packages/OCC/Display/backend.py", line 265, in load_backend raise ImportError("No compliant GUI library could be imported.\n" ImportError: No compliant GUI library could be imported. Either PyQt5, PyQt4, PySide2, PySide, or wxPython is required (climbingwall) 10:48:17 climbing-wall-> >

Do you know how to fix it?

Mario