Python 3.9 pip installation issue with numpy

[asim-pointivo]

It appears that, with Python 3.9, if I already have numpy-1.22.2 (latest version as of 17th Feb 2020) in my conda enviornment, then when installing mystic, pip will try to downgrade numpy to version 1.19.5. I looked at the setup.py and it appears that we are only restricting numpy version to be lesser than 1.20.0 with Python 3.6; see here

mystic/setup.py

Line 430 in e6ee20e

elif sysversion == (3,6):# or IS_PYPY

. The setup.py would indicate that on Python 3.9, it should not try to downgrade numpy.

I was not able to figure this issue out, but I think I might have some clue as to what might be happening. I downloaded the wheel for mystic from here https://pypi.org/project/mystic/0.3.8/#files and took a look at metadata.json and METADATA files; both mention "numpy (<1.20.0,>=1.0)" as requirements. I believe we have a single wheel for all python versions, we might need to build multiple wheels for different python versions.

[mmckerns]

@asim-pointivo: your reasoning may be correct. I likely built the wheel with python3.6.

A new release is imminent, and 3.6 is being deprecated. So, I believe this issue should go away with a new wheel. I believe I should also change my build procedure to use the latest stable supported version to build wheels, as opposed to the oldest.

[mmckerns]

related?: uqfoundation/pathos#222

[mmckerns]

should be fixed (by #171). Reopen if it's not.