Hi Ken,

> On 3. Jun 2025, at 18:25, Ken Leppert <lepp...@ulm.edu> wrote:
> 
> Hi Oliver,
> 
> Thank you for your response.  
> 
> The result of printing the pyarts_file appears to be the correct arts-2.6 
> directory (/home/ken/ARTS/arts-2.6/build/python/src/pyarts/__init__.py), and 
> the result of printing the version gives "3.0.0dev7".  Is this the incorrect, 
> developmental version of pyarts?

Yes, you checked out the main (development) branch for ARTS 3. It is quite 
different from ARTS 2 and still under development, hence the warning at the top 
of the README.md file that you might want to stay away from it for now. :-)

> At first, I couldn't get the command "mamba install -c rttools pyarts" to 
> work.

This should be the preferred way. What error did you get?

>   Hence, I followed the instructions in README.md which perhaps led me to 
> install the wrong version.  Perhaps executing the mamba install line in the 
> pyarts-dev environment I created instead of from the raw command line would 
> work.  But, is there a way to uninstall or override the 3.0.0dev7 version if 
> that is in fact, the wrong version of pyarts?

Use `pip uninstall pyarts` to uninstall the dev version of the pyarts package.

To get the latest stable version, you can delete your build directory and then 
switch to the stable branch by running `git checkout v2.6.x` in your 
`/home/ken/ARTS/arts-2.6` directory (or start with a fresh clone with `git 
clone -b v2.6.x https://github.com/atmtools/arts`) and start over your 
compilation. 

Cheers,
Oliver


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