Problems installing gmsh

[keithsloan52]

I have installed the gmsh python module in the past but I am now having a problem getting FreeCAD to recognise a recent install.

From FreeCAD python console I am

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import sys
print(sys.path)

One of the directories listed is '/Applications/FreeCAD 0.19.1.app/Contents/Resources/lib/python3.8/site-packages'

My FreeCAD version is

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OS: macOS 10.15
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24276 (Git)
Build type: Release
Branch: (HEAD detached at 0.19.1)
Hash: a88db11e0a908f6e38f92bfc5187b13ebe470438
Python version: 3.8.8
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.4.0
Locale: C/Default (C)

And following instructions on https://pypi.org/project/gmsh/ but targeting the FreeCAD path run command

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pip install --upgrade gmsh -t '/Applications/FreeCAD 0.19.1.app/Contents/Resources/lib/python3.8/site-packages'

But if I try import gmsh from FreeCAD python console I get

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raceback (most recent call last):
  File "<input>", line 1, in <module>
ModuleNotFoundError: No module named 'gmsh'

If I list the contents of the site-packages I get

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gmsh-4.8.4-py3.8.egg-info
gmsh-4.8.4-py3.9.egg-info

but no plain gmsh subdirectory

[Roy_043]

Have you specified the path? F.e. in the Mesh_RemeshGmsh task panel.

[keithsloan52]

Have you specified the path? F.e. in the Mesh_RemeshGmsh task panel.

Not got that far, just trying import gmsh from FreeCAD python console. As far as I know if gmsh is installed to one of the directories
that show up with import sys; print(sys.path) it should work.

[keithsloan52]

I notice that when I try and install gmsh I get a message about legacy setup

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pip install gmsh -t '/Applications/FreeCAD 0.19.1.app/Contents/Resources/lib/python3.8/site-packages' 
Collecting gmsh
  Using cached gmsh-4.8.4.tar.gz (10 kB)
Using legacy 'setup.py install' for gmsh, since package 'wheel' is not installed.
Installing collected packages: gmsh
    Running setup.py install for gmsh ... done
Successfully installed gmsh-4.8.4

But I still get this message after ensuring wheel is installed

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pip install wheel -t '/Applications/FreeCAD 0.19.1.app/Contents/Resources/lib/python3.8/site-packages' --upgrade
Collecting wheel
  Using cached wheel-0.36.2-py2.py3-none-any.whl (35 kB)
Installing collected packages: wheel
Successfully installed wheel-0.36.2

[keithsloan52]

Still have problems installing gmsh via pip

Asked in gmsh gitlab issues and got this reply

The way pip works is still quite mysterious to me. In case of trouble I would suggest simply downloading the binary SDK from gmsh.info, unpack it wherever you want, then simply add the "lib" subdirectory of the SDK to your PYTHONPATH variable. See https://gitlab.onelab.info/gmsh/gmsh/-/ ... README.txt

How would one adapt this for FreeCAD as I assume FreeCAD does not use PYTHONPATH?