What is the best way of installing Python's scientific libraries in MacPorts?

Ryan Schmidt ryandesign at macports.org
Tue Oct 5 22:26:31 UTC 2021

On Oct 4, 2021, at 15:57, Christopher Jones wrote:

> On 4 Oct 2021, at 9:18 pm, Artemio González López wrote:
>> I only experienced a very minor glitch, namely that for some reason (probably a minor bug?) the /opt/local/Library/Frameworks/Versions/3.9/bin directory where jupyter resides is not in the $PATH, so you must add it by hand if you want to invoke (say) jupyter with just its name.
> No, that is not a bug but intentional. it is that way because in principle you could have multiple versions installed, for different python versions. For that reason one specific python version cannot place its binaries under the default ${prefix}/bin with the nominal names, as that would prevent others from then being installed.
> The port does in fact install binaries, but they are suffixed with the python version
> Oberon ~/Projects/MacPorts/ports > port contents py39-jupyter_client | grep bin
>   /opt/local/Library/Frameworks/Python.framework/Versions/3.9/bin/jupyter-kernel
>   /opt/local/Library/Frameworks/Python.framework/Versions/3.9/bin/jupyter-kernelspec
>   /opt/local/Library/Frameworks/Python.framework/Versions/3.9/bin/jupyter-run
>   /opt/local/bin/jupyter-kernel-3.9
>   /opt/local/bin/jupyter-kernelspec-3.9
>   /opt/local/bin/jupyter-run-3.9
> so to run a specific version (for a given python version) run XYZ-3.9 etc.

That's right.

The "select" mechanism has already been mentioned earlier in this thread. It has been requested that the py-jupyter ports be given a "select" implementation, but so far that request has not been acted upon. See https://trac.macports.org/ticket/62414

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