Conda

Conda is an open source package management system and environment management system that runs on Windows, macOS and Linux. Conda quickly installs, runs and updates packages and their dependencies. Conda easily creates, saves, loads and switches between environments on your local computer. It was created for Python programs, but it can package and distribute software for any language.

Links

• Conda home and docs
• Anaconda package lists

Useful commands

For full documentation of any command, type the command followed by --help.
E.g. conda create --help

Managing conda and anaconda

conda info	Verify conda is installed, check version #
conda update conda	Update conda package and environment manager to current version
conda update anaconda	Update the anaconda meta package (the library of packages ready to install with conda command)

Managing environments

conda info --envs	Get a list of all my environments, active environment shown with *
conda create --name snowflakes biopython	Create an environment and install program(s)
source activate snowflakes (Linux, OS X) activate snowflakes (Windows)	Activate the new environment to use it
conda create -n flowers --clone snowflakes	Make exact copy of an environment
conda remove -n flowers --all	Delete an environment
conda env export > puppies.yml	Save current environment to a file. This is the preferred way as it includes pip-installed packages and the used channels as well.
conda env create -f puppies.yml	Load environment from a file

Managing Python

conda search -f python	Check versions of Python available to install
conda create -n snakes python=3.4	Install different version of Python in new environment

Managing .condarc configuration

conda config --get	Get all keys and values from my .condarc file
conda config --get channels	Get value of the key channels from .condarc file
conda config --add channels pandas	Add a new value to channels so conda looks for packages in this location
conda config --env --add channels conda-forge	Add conda-forge as channel for the active environment, i.e. not to user's .condarc

Managing packages

conda list	View list of packages and versions installed in active environment
conda list -r	View list of packages with installation (revision) history (cf. conda install -r)
conda search beautiful-soup	Search for a package to see if it is available to conda install
conda install -n bunnies beautiful-soup	Install a new package (leave out -n option for installation in current active environment)
conda install -r <rev> beautiful-soup	Install a specific revision of a package (cf. conda list -r)
conda update beautiful-soup	Update a package in the current environment
conda search --override-channels -c pandas bottleneck	Search for a package in a specific location
conda install -c pandas bottleneck	Install a package from a specific channel
conda search --override-channels -c defaults beautiful-soup	Search for a package to see if it is available from the Anaconda repository

Remove packages, or channels

conda remove --name bunnies beautiful-soup	Remove one package from any named environment
conda remove beautiful-soup	Remove one package from the active environment
conda remove --name bunnies beautiful-soup astroid	Remove multiple packages from any environment