Added functions for mpi support in qutensornet

[Vinitha-balachandran]

No description provided.

[alecandido]

Tests are missing

[Vinitha-balachandran]

Tests are missing

Added pytest. Need to install pytest-mpi.

[alecandido]

Added pytest. Need to install pytest-mpi.

pytest-mpi is a very little maintained project, with very minimal code.
https://github.com/aragilar/pytest-mpi/blob/master/src/pytest_mpi/__init__.py

The rather ideal situation in which it could be convenient to just vendor the part we're interested in.

What do you exactly need from pytest-mpi?

[Vinitha-balachandran]

Added pytest. Need to install pytest-mpi.

pytest-mpi is a very little maintained project, with very minimal code. https://github.com/aragilar/pytest-mpi/blob/master/src/pytest_mpi/__init__.py

The rather ideal situation in which it could be convenient to just vendor the part we're interested in.

What do you exactly need from pytest-mpi?

To test mpi implementation. I thought you were referring that pytests are missing in your previous comment.

[alecandido]

I thought you were referring that pytests are missing in your previous comment.

Indeed

To test mpi implementation.

I was looking for a much more specific answer. How are you planning to use the features of pytest-mpi in your test code?

[Vinitha-balachandran]

I thought you were referring that pytests are missing in your previous comment.

Indeed

To test mpi implementation.

I was looking for a much more specific answer. How are you planning to use the features of pytest-mpi in your test code?

I was looking for how pytests can be implemented while using mpi. @liweintu suggested this pytest-mpi which I am using now. It is in test_quimb_backend.py to test the function which parallelize the circuit evaluation. As commented in the file, pytest for mpi implementation can be checked by command mpirun -n 2 python -m pytest tests/test_quimb_backend.py --with-mpi. WIthout the --with-mpi , it will skip the mpi tests.

[alecandido]

As commented in the file, pytest for mpi implementation can be checked by command mpirun -n 2 python -m pytest tests/test_quimb_backend.py --with-mpi. WIthout the --with-mpi , it will skip the mpi tests.

This is a basic Pytest feature, no need of plugins to do it. You can define yourself the marker in the Pytest configs (not even needed to use executable code, just write in pyproject.toml, and Pytest will load it).

The official documentation about markers is here:
https://docs.pytest.org/en/8.1.x/how-to/mark.html
(it's pretty brief, and linking to a variety of examples with clarifications)

[Vinitha-balachandran]

As commented in the file, pytest for mpi implementation can be checked by command mpirun -n 2 python -m pytest tests/test_quimb_backend.py --with-mpi. WIthout the --with-mpi , it will skip the mpi tests.

This is a basic Pytest feature, no need of plugins to do it. You can define yourself the marker in the Pytest configs (not even needed to use executable code, just write in pyproject.toml, and Pytest will load it).

The official documentation about markers is here: https://docs.pytest.org/en/8.1.x/how-to/mark.html (it's pretty brief, and linking to a variety of examples with clarifications)

Thanks for the suggestion. I have updated pyproject.toml to use for 2 cpus (just used minimum requirement) and tests are passing using the marker feature. Updated the files in the repo.