PIP installers available!

2 years 4 months ago - 2 years 4 months ago #4222 by matthiash
Dear NGSolve users,

Finally we managed to provide pip-installers for our software. This means, installing NGSolve on your computer now becomes as easy as py!
pip install ngsolve

For Linux, we also provide an ngsolve-avx2 package which is compiled using AVX2 instructions (only working on supported hardware).

Also nightly builds will be provided (use the --pre flag of pip to install prerelease versions).

Similar to the conda installers, run-time code generation is currently not supported on all platforms, but we are working on it.

The NGSolve Team
Last edit: 2 years 4 months ago by matthiash.
The following user(s) said Thank You: paul.stocker, alex.v
2 years 4 months ago #4236 by matthiash
Replied by matthiash on topic PIP installers available!
Some people reported problems starting Python after installing the ngsolve pip-package on MacOS, and after rebooting. Updating ngsolve to the NGSolve-6.2.2202 release solves the problem.
If pip is also not working (because of this problem), you can manually delete the directory /Library/Frameworks/Python.framework/Versions/3.10/Contents ( change 3.10 to your python version).

The error message you get, when having this problem looks like this:
dyld[3600]: Library not loaded: /Library/Frameworks/Python.framework/Versions/3.10/Python
  Referenced from: /Library/Frameworks/Python.framework/Versions/3.10/bin/python3.10
  Reason: tried:  '/Library/Frameworks/Python.framework/Versions/3.10/Python' (code signature invalid (errno=1) sliceOffset=0x004B0000, codeBlobOffset=0x00483BA0, codeBlobSize=0x000135F0 for 

2 years 3 months ago #4283 by alex.v
Replied by alex.v on topic PIP installers available!
I am having issues with installing it through pip on Ubuntu 21.10. It does not seem to install with umfpack, something that the apt version did.

Running the following line ```a_assembled.mat.Inverse(freedofs=freedofs, inverse="umfpack")``` works with the apt version, but crashes the pip installation.

Is this an oversight, a temporary limitation, or a permanent limitation of the pip install?

Additionally, this page  shows the default CMake options when building from source. Is there a list to show which options are enabled for the different distribution modes (pip, apt, conda, etc.) of NGSolve?
2 years 2 months ago #4367 by alex.v
Replied by alex.v on topic PIP installers available!
Any update on this?
1 year 8 months ago - 1 year 8 months ago #4542 by paul.stocker
Hi everyone!
I tried the pip installer on windows with anaconda

Running the conda environement
conda create -n test python=3.9
I gave pip install ngsolve a try. The install works, even netgen opens a gui, but ngsolve cannot find ngslib.
(EDIT: I tried without conda and got the same result.)

from .ngslib import __version__, ngstd, bla, la, fem, comp, solve
ImportError: DLL load failed while importing ngslib: The specified module could not be found.

I tried to add everything to PATH and PYTHONPATH by hand without success. I uploaded the output of conda info --system here

I also tried
conda install -c ngsolve ngsolve
but could not find a python version that would satisfy the specifications. I tried python3.9 giving
 - ngsolve -> python[version='>=3.7,<3.8.0a0|>=3.8,<3.9.0a0']
so I tried python3.7 telling me
 - ngsolve -> python[version='>=2.7,<2.8.0a0|>=3.6,<3.7.0a0|>=3.10,<3.11.0a0|>=3.9,<3.10.0a0']

Any hints to get this working?

Last edit: 1 year 8 months ago by paul.stocker.
1 year 8 months ago #4557 by maurosgroi
Dear Developers,
I am facing the very same problems described by  paul.stocker .
Which version of Anaconda should we use?
Is there a workaround to solve the problem?
Thanks a lot and best regards,
Mauro Sgroi.
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