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ImportError: cannot import name '_psutil_osx' from partially initialized module 'psutil'

See original GitHub issue

What is the problem?

unable to import Ray or run Ray CLI because of psutil errors

macOS 11.0.1 (20B29)
Ray commit 0138c2dbb4857f9c716877a5a5f3cd5cd5a9320a
Python 3.8.6 [Clang 12.0.0 (clang-1200.0.32.28)]

Reproduction

python3 -m pip install -e .
python3 -c "import ray" results in:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File ".../ray/python/ray/__init__.py", line 63, in <module>
    import ray._raylet  # noqa: E402
  File "python/ray/_raylet.pyx", line 98, in init ray._raylet
    import ray.memory_monitor as memory_monitor
  File ".../ray/python/ray/memory_monitor.py", line 9, in <module>
    import psutil  # noqa E402
  File ".../ray/python/ray/thirdparty_files/psutil/__init__.py", line 159, in <module>
    from . import _psosx as _psplatform
  File ".../ray/python/ray/thirdparty_files/psutil/_psosx.py", line 15, in <module>
    from . import _psutil_osx as cext
ImportError: cannot import name '_psutil_osx' from partially initialized module 'psutil' (most likely due to a circular import) (.../ray/python/ray/thirdparty_files/psutil/__init__.py)

python3 -c "import ray.memory_monitor" results in the same error

python3 -c "import psutil" results in no errors

I have verified my script runs in a clean environment and reproduces the issue.
I have verified the issue also occurs with the latest wheels.

Issue Analytics

State:
Created 3 years ago
Comments:5 (5 by maintainers)

Top GitHub Comments

2reactions

sumanthratnacommented, Dec 4, 2020

You can fix it by deleting the thirdparty_files directory I think

Thanks!

Maybe we can add this to our contribution doc?

Definitely. This is what it took for me:

pushd python/ && python3 -m pip install -e . && popd
rm -rf python/ray/thirdparty_files/
python3 -m pip install setproctitle

I’ll leave this open for now; I’ll try to push a doc-fix PR tomorrow.

1reaction

rkooo567commented, Dec 4, 2020

You can fix it by deleting the thirdparty_files directory I think

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