How can a pre-existing conda environment be updated with another .yml file. This is extremely helpful when working on projects that have multiple requirement files, i.e. base.yml, local.yml, production.yml, etc.
For example, below is a base.yml file has conda-forge, conda, and pip packages:
base.yml
name: myenv
channels:
- conda-forge
dependencies:
- django=1.10.5
- pip:
- django-crispy-forms==1.6.1
The actual environment is created with: conda env create -f base.yml.
Later on, additional packages need to be added to base.yml. Another file, say local.yml, needs to import those updates.
Previous attempts to accomplish this include:
creating a local.yml file with an import definition:
channels:
dependencies:
- pip:
- boto3==1.4.4
imports:
- requirements/base.
And then run the command: conda install -f local.yml.
This does not work. Any thoughts?
conda env create -f ~/CoqGym/coq_gym.yml (see: stackoverflow.com/questions/54492671/…)
Try using conda env update:
conda activate myenv
conda env update --file local.yml --prune
--prune uninstalls dependencies which were removed from local.yml, as pointed out in this answer by @Blink.
Or without the need to activate the environment (thanks @NumesSanguis):
conda env update --name myenv --file local.yml --prune
See Updating an environment in Conda User Guide.
The suggested answer is partially correct. You'll need to add the --prune option to also uninstall packages that were removed from the environment.yml. Correct command:
conda env update -f local.yml --prune
requirements.yml file has a name: at the top?
alkamid's answer is on the right lines, but I have found that Conda fails to install new dependencies if the environment is already active. Deactivating the environment first resolves this:
source deactivate;
conda env update -f whatever.yml;
source activate my_environment_name; # Must be AFTER the conda env update line!
-n <environment name>, but by default it seems to work with the expected environment (maybe the most recently active, or just a default environment choice)
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-fandfile.yml. Removing the equals sign will make tab completion work on the.ymlfilename.--name env_nameto ignore anyname: footag inlocal.yml. Also prevents the need to activate myenv first. Full command:conda env update --name env_name --file local.ymlFrom: stackoverflow.com/a/45525593/3399066 's commentnameparameter, otherwise it creates with this update command