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Project Description

This is a small tool which can be used to activate conda environments. It is an alternative to using source activate <env> and instead uses a conda sub-command to spawn a new shell with the environment activated. Deactivating the environment is simply done by exiting this sub-shell. This is very similar to, and based on, the pew workon command from pew. One major advantage of this is that it does not depend on the shell you use nor does it interact with the shell at all. This means it is not restricted to bash and zsh.

Activating an environment simply looks like this:

$ conda create -n py26 python=2.6
...
$ conda info -e
# conda environments:
#
py26                     /home/flub/miniconda3/envs/py26
root                  *  /home/flub/miniconda3
$ conda workon py26
Launching subshell in conda environment.  Type "exit" or "Ctr-D" to return.
(py26) $ conda info -e
# conda environments:
#
py26                  *  /home/flub/miniconda3/envs/py26
root                     /home/flub/miniconda3
(py26) $ exit
$ conda info -e
# conda environments:
#
py26                     /home/flub/miniconda3/envs/py26
root                  *  /home/flub/miniconda3

Listing the available environments can be done using either conda workon -l|--list or using the standard conda env list or conda info -e|--envs.

Another feature is that it provides an easy throw-away temporary environment based on a package spec on the command line:

$ conda worktmp python=3.4 sphinx
Fetching package metadata: ..
Solving package specifications: .
Package plan for installation in environment /tmp/tmp7ua0_le9/env:
...
Proceed ([y]/n)? y
...
Launching subshell in conda environment.  Type "exit" or "Ctr-D" to return.
$ conda info | grep default
  default environment : /tmp/tmp7ua0_le9/env
$ exit
$ conda info | grep default
  default environment : /home/flub/miniconda3
$

Likewise a temporary environment can be created from an environment.yml file:

$ conda worktmp -f path/to/environment.yml
...
Launching subshell in conda environment.  Type "exit" or "Ctr-D" to return.

If -f|--file is used without an argument this will look for environment.yml in the current directory. When using worktmp one can also directly invoke pip -e <path> by using the -e|--editable option. This is convenient to start developing on a package:

$ conda worktmp -f -e.
...
Proceed ([y]/n)? y
...
  Running setup.py develop for foo
Successfully installed foo
Launching subshell in conda environment.  Type "exit" or "Ctr-D" to return.
$

Installation

The conda-workon command needs to be installed in the root conda environment.

Using pip

Ensure you have pip installed in the conda root environment using conda install pip. Then making sure to use this version of pip install conda-workon using:

$ pip install conda-workon

Using conda

The conda-forge project packages conda-workon so you can install it once you have added the conda-forge channels:

conda config --add channels conda-forge
conda install conda-workon

Configuring the Prompt

The conda-workon command does not interfere with the shell at all, it simply starts a new sub-shell with a modified path. This means that by default the prompt of the shell will not indicate which conda environment you are using. However the currently activated conda environment is available in the CONDA_DEFAULT_ENV environment variable, which allows you to easily configure your shell as you prefer. A simple example using the fish shell is to include the following fragment in the fish_prompt function:

# Show the conda environment, calculate __fish_prompt_conda only once
if set -q CONDA_DEFAULT_ENV
    if not set -q __fish_prompt_conda
        set -g __fish_prompt_conda (set_color --bold -b blue red)$CONDA_DEFAULT_ENV"$__fish_prompt_normal "
    end
    echo -n $__fish_prompt_conda
end

Changelog

0.4

  • Split into two commands: conda-workon and conda-worktmp.
  • Implement listing using conda-workon -l|--list.
  • Add support for using environment.yml using conda-worktmp -f|--file.
  • Add support for directly calling pip -e <path> using conda-worktmp -e|--editable <path>.

0.3

  • Add a --use-local option to use together with --tmp. This will use conda create --use-local to create the environment.
  • Use the conda binary invoked rather then looking it up on the PATH.
Release History

Release History

0.4.0

This version

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0.3.0

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0.2.0

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0.1.0

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Download Files

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
conda_workon-0.4.0-py2.py3-none-any.whl (7.8 kB) Copy SHA256 Checksum SHA256 py2.py3 Wheel Nov 28, 2016
conda-workon-0.4.0.tar.gz (5.0 kB) Copy SHA256 Checksum SHA256 Source Nov 28, 2016

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