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Package, dependency and environment management for any language
Conda Cheat Sheet 4.7
Create software environments for development and execution in a reproducible way.
For the smallest footprint, install Miniconda,which is just the Conda package manager and Python:
Define Conda environments
Create a YAML file, e.g., my-dev-env.yml as follows: Nfs carbon repack.
(default channel listed to be explicit, can be omitted)
Create Conda environments
conda env create -f <FILENAME>
conda env create -f my-dev-env.yml
(De-)activate Conda environment
conda activate <ENV-NAME>
conda activate my-dev-env
conda deactivate my-dev-env
Search for packages
conda search <PKG-NAME> searches whatever channels are configured (at least, that is the default channel)
conda search --channel <CHANNEL-NAME> <PKG-NAME> searches the packagealso in the specified channel
Add channels
conda config --add channels <CHANNEL-NAME>
Update a Conda environment
Same as: install new packages into environment.Update the YAML file, e.g.,
Update the environment: conda env update -f my-dev-env.yml
Remove an environment
Conda Cheat Sheet 4.80
conda env remove --name <ENV-NAME>
Remove package from environment
Uninstall package: conda remove --name <ENV-NAME> <PKG-NAME>
Install packages via pip
Conda Cheat Sheet 4.8 Pdf
Specify install command in the YAML file as follows:
For the git repo case, this installs the master branch. To install a specific branch, change as follows:
Export Conda environment specification
Why could this be important? Specifying (“pinning”) package versions prevents a change/updateof said package, BUT other packages/libraries not specifically listed in the YAML file cannevertheless be changed during conda env update. In the worst case, this may break something.
As soon as the work performed in the Conda environment reaches a certain level ofmaturity (e.g., dependencies no longer change), one can export a more comprehensivespecification of the respective Conda environment viaconda env export --name ENV-NAME > my-dev-env.yml. Obviously, this will overwritemy-dev-env.yml.
Setting environment variables
In the top-level directory of the Conda environment (/envs/my-dev-env/),create the following files and folders:
Edit ./etc/conda/activate.d/env_vars.sh as follows:
Edit ./etc/conda/deactivate.d/env_vars.sh as follows:
NB: Preferred way for handling stuff such as LD_LIBRARY_PATH etc.