Installing `pymbar` from conda forcing a downgrade of Python 3.7 → 3.6
See original GitHub issueInstalling pymbar
from omnia
via conda
is trying to downgrade python (and a bunch of other packages). I’m not sure this is the intended effect (I can’t see anything in the repository pinning python=3.6
or python<3.7
).
Briefly, I had an environment with pymbar
installed, upgraded ambertools
from 18 to 19 and python
from 3.6.x to 3.7.3. I then lost the ability to import pymbar
. I thought this was probably removed accidentally during whatever magic conda
uses for conflict management, but trying to reinstall pymbar
using the same command will downgrade ~20 packages, including python.
(paprika-dev) /m/d/d/p/pAPRika-dev ❯❯❯ conda install -c omnia pymbar ✘ 2 openmm-2
Collecting package metadata: done
Solving environment: done
## Package Plan ##
environment location: /home/davids4/data/anaconda3/envs/paprika-dev
added / updated specs:
- pymbar
The following packages will be downloaded:
package | build
---------------------------|-----------------
coverage-4.3.4 | py36_0 226 KB omnia
------------------------------------------------------------
Total: 226 KB
The following NEW packages will be INSTALLED:
pymbar omnia/linux-64::pymbar-3.0.1.beta0-np111py36_0
[snip]
The following packages will be DOWNGRADED:
[snip]
python 3.7.3-h0371630_0 --> 3.6.8-h0371630_0
Issue Analytics
- State:
- Created 4 years ago
- Comments:6 (3 by maintainers)
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Right. If you use another
conda install
or similar command with different-c ...
settings, it resolves only for that command and makes changes to the environment to solve that specific call. Its why we say for allomnia
packages to also includeconda-forge
as a higher priority channel to help reduce those oddities. If you are having issues with resolution, try doing everything in 1 line carefully considering the channel priority.Yup