Python version change

[isuruf]

I don't have a reproducer where python version was upgraded, but here's an example

conda create -p /home/isuru/miniconda3/envs/py37 python=3.7
conda install opbeat -p /home/isuru/miniconda3/envs/py37 # this errors because opbeat need py<37
mamba install opbeat -p /home/isuru/miniconda3/envs/py37 # Downgrades python to 3.6

[SylvainCorlay]

conda install opbeat -p /home/isuru/miniconda3/envs/py37 # this errors because opbeat need py<37
mamba install opbeat -p /home/isuru/miniconda3/envs/py37 # Downgrades python to 3.6

Thanks for submitting this. I presume that if the mamba behavior is to be considered incorrect, it means that some packages should special-cased to never be downgraded or upgraded unless explicitly required?

[isuruf]

Yes, if mamba is to be a drop-in for conda.

[SylvainCorlay]

Is it only python, or also other interpreters or packages?

[isuruf]

I've no idea. Sorry.

[wolfv]

It's only python as far as i am aware. This should be easy to fix by pinning python to the currently installed version.

[wolfv]

this is fixed by pinning python if it's in the environment.

Release is out now (0.1.1) and going to be available on conda-forge soon!

[isuruf]

Thanks for fixing this.