Failling tests when installed on python 3.8 or later

[git-kale]

Phylanx can be installed on a python with a version greater than 3.7 but running the most basic tests is throwing error.

Docker: stellargroup/phylanx_base:prerequisites
Phylanx at commit: d48b611bbc5337bc14ba93e4bf3cb
Build cmd: cmake -H/phylanx_src -B/phylanx_src/build -DCMAKE_BUILD_TYPE=Debug -DHPX_DIR=/usr/local/lib/cmake/HPX/ -Dblaze_DIR=/usr/local/share/blaze/cmake/ -Dpybind11_DIR=/usr/local/share/cmake/pybind11/

Test Case:
https://github.com/STEllAR-GROUP/phylanx/blob/ce34d25e7550d04533d79fff96153f7d9c476953/tests/regressions/python/832_performance_data.py

Error generated:
https://gist.github.com/git-kale/3d2eecda353df11a0d10efe5953850f2

[hkaiser]

@rtohid Would you have the time to look into this? From what I can see this is caused by some changes in the AST introduced with Python 3.8.

[rtohid]

@hkaiser, you are right, ast.Constant was added in 3.6.
@git-kale #1219 should resolve the issue. Please let me know if the issue persisted.

[git-kale]

@rtohid
I changed the files in system according to commit : 0a1970cc1500f73956f482fd95bd780b06462f01
And a new error has popped: https://gist.github.com/git-kale/85fae9e96dc66301ef648bf1eaf231fd

[rtohid]

@git-kale, hope this works.

[git-kale]

@rtohid

AttributeError: 'PhySL' object has no attribute '_<data-type>'
FATAL: exception not rethrown

data-type=['bool','float','int','str']

[rtohid]

@git-kale, could you please provide the complete error message? Thank you.

[git-kale]

@rtohid
https://gist.github.com/git-kale/607b3bb6c489ead4fe24d851fe528a0a

[rtohid]

@git-kale, thank you. It's a bit strange, #1219 adds _Constant and should've prevented this issue. Let's see how CI build goes. Meanwhile, you may want to double check and make sure that you do have PhySL._Constant in the module getting loaded.

[rtohid]

@git-kale, can you please make sure the changes are reflected to the module you load during program execution?

[git-kale]

Okay, I'll check that and will inform you tomorrow

[git-kale]

@rtohid https://gist.github.com/git-kale/9579c7e649d3c4f742433e467b943f8d This is the debug log generated after adding the folowing lines.

from phylanx import PhylanxSession      
PhylanxSession.config(PhylanxSession.cfg + ["--hpx:debug-hpx-log=file"])