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commented
5 years ago Joris Van den Bossche / @jorisvandenbossche: There are not yet binary wheels available for Python 3.8, so therefore pip is trying to build from source. And then it appears something goes wrong with installing/finding numpy, which seems similar to the error reported in ARROW-5210. As I mentioned there, this is an error in the pyproject.toml that we do not list numpy as a build dependency (pip will create a new environment with all build dependencies, therefore installing numpy before hand does not solve it).
Now, even if the pyproject.toml would correctly list this, it is quite likely that installing from source with just pip install pyarrow is not going to work, as there are a lot of other (non-python) dependencies that you would need to ensure are available. If you do want to install from source, see https://arrow.apache.org/docs/developers/python.html#python-development for detailed instructions), otherwise you will need to wait until there are wheels available, or use Python 3.7 instead of 3.8, or use conda instead (conda-forge already has binary packages of pyarrow for Python 3.8).
When I install pyarrow in python 3.7.5 with
pip install pyarrowit works.However with python 3.8.0 it fails with the following error :
I see the line "ModuleNotFoundError: No module named 'numpy'" but installing numpy did not change anything.
Environment: Ubuntu 19.10 / Python 3.8.0 Reporter: Fabien / @fabiencelier
Related issues:
Note: This issue was originally created as ARROW-7076. Please see the migration documentation for further details.