Pyproject

[steven-murray]

Adds pyproject.toml which should de-necessitate pre-installing numpy into a fresh environment before installing pypolychord.

Closes #26

[steven-murray]

I think the problem here is that python setup.py install doesn't use the pyproject.yaml. I updated to use pip install . instead -- let's see if that works.

[steven-murray]

I think there's something going on here that I don't understand. Could you look at the travis errors? It's picking up the numpy requirement fine, and installing pypolychord fine, but when trying to import it, it's saying that it can't find the shared lib.

[williamjameshandley]

Ah, pip installing polychord is currently an open PR #24 Do you have to use pip to get the .toml file to work?

[steven-murray]

Hmmm yes I think so. I'll have a bit more of a look.

[steven-murray]

Yes, using python setup.py install of course literally just loads setup.py with python, and so will break if numpy is not installed. pip instead first checks pyproject.toml for build deps. Perhaps this PR should just sit until #24 is merged. Is that happening soon?

[williamjameshandley]

@tilmantroester, what remains to be done to fix #24 ?

[tilmantroester]

Fixing the macOS travis builds and re-adding python 2 support. The travis failure is bizarre while the python 2 part should be straightforward to implement but I haven't had time to look into it.

[williamjameshandley]

Hi @steven-murray. There have been some fairly major changes here to the python setup after the merge of #24, and a few new errors are emerging now on the travis build. Have you seen these before in your experience of implementing toml files?

[steven-murray]

Wow, no I've never seen errors like that. Looks like it's mostly working with MPI=1, but not with MPI=0. You might have to install some blas library manually?