bug#52606: FreeCAD - Missing dependency python-ply

[Jacob Hrbek]

Steps to reproduce: 1. Get FreeCAD and open any project 2. Navigate to OpenSCAD workbench 3. In top-menu: OpenSCAD -> Add OpenSCAD Element... 4. Try to create `cube()` as **NON**-mesh and expect the following:

21:06:38 Traceback (most recent call last):

21:06:38 File "/gnu/store/c600mwsbfxyiv0i35y7srhxp2g3ya7wb-freecad-0.19.2/Mod/OpenSCAD/OpenSCADCommands.py", line 380, in addelement

21:06:38 import importCSG

21:06:38 File "/gnu/store/mcdj73r1d10nqmz9pjcmkxsni00kffz9-python-shiboken-2-5.15.2/lib/python3.9/site-packages/shiboken2/files.dir/shibokensupport/__feature__.py", line 142, in _import

21:06:38 return original_import(name, *args, **kwargs)

21:06:38 File "/gnu/store/c600mwsbfxyiv0i35y7srhxp2g3ya7wb-freecad-0.19.2/Mod/OpenSCAD/importCSG.py", line 44, in <module>

21:06:38 import ply.lex as lex

21: 06:38 File "/gnu/store/mcdj73r1d10nqmz9pjcmkxsni00kffz9-python-shiboken-2-5.15.2/lib/python3.9/site-packages/shiboken2/files.dir/shibokensupport/__feature__.py", line 142, in _import

21:06:38 return original_import(name, *args, **kwargs)

21:06:38 ModuleNotFoundError: No module named 'ply'

--
-- Jacob Hrbek

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