I’m trying to install pystan on a Raspberry Pi 4.
Running python3 -m pip install pystan yields the following
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Collecting pystan
Using cached https://www.piwheels.org/simple/pystan/pystan-3.3.0-py3-none-any.whl (13 kB)
Collecting aiohttp<4.0,>=3.6 (from pystan)
Using cached https://www.piwheels.org/simple/aiohttp/aiohttp-3.8.4-cp37-cp37m-linux_armv7l.whl (486 kB)
Collecting clikit<0.7,>=0.6 (from pystan)
Using cached https://www.piwheels.org/simple/clikit/clikit-0.6.2-py2.py3-none-any.whl (91 kB)
INFO: pip is looking at multiple versions of pystan to determine which version is compatible with other requirements. This could take a while.
Collecting pystan
Using cached https://www.piwheels.org/simple/pystan/pystan-3.2.0-py3-none-any.whl (13 kB)
Using cached https://www.piwheels.org/simple/pystan/pystan-3.1.1-py3-none-any.whl (13 kB)
Using cached https://www.piwheels.org/simple/pystan/pystan-3.1.0-py3-none-any.whl (13 kB)
Using cached https://www.piwheels.org/simple/pystan/pystan-3.0.2-py3-none-any.whl (13 kB)
Using cached https://www.piwheels.org/simple/pystan/pystan-3.0.1-py3-none-any.whl (12 kB)
Using cached https://www.piwheels.org/simple/pystan/pystan-3.0.0-py3-none-any.whl (12 kB)
Using cached pystan-2.19.1.1.tar.gz (16.2 MB)
Installing build dependencies ... done
Getting requirements to build wheel ... done
Preparing metadata (pyproject.toml) ... error
error: subprocess-exited-with-error
× Preparing metadata (pyproject.toml) did not run successfully.
│ exit code: 1
╰─> [1 lines of output]
Cython>=0.22 and NumPy are required.
[end of output]
note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed
× Encountered error while generating package metadata.
╰─> See above for output.
note: This is an issue with the package mentioned above, not pip.
hint: See above for details.
This is weird to me because I have both Cython (0.29.34) and Numpy (1.21.6) installed and working fine. I’d be grateful for any advice!