conda-project#

Tool for encapsulating, running, and reproducing projects with conda environments.

Why?#

Sharing your work is more than sharing your code in a script file or notebook. To make your work properly reproducible, it is necessary to include the list of required third-party dependencies, specifications for how to run your code, and any other files that it may need.

See 8 Levels of Reproduciblity for an in-depth discussion of the differences between “It works for me.” to “I’ve made sure that anyone can reliably execute my work.” Conda Project is a framework that aims to help you to ensure a high degree of reproducibility in the projects you create.

How is this different from Anaconda Project?#

This package is intended as a successor to Anaconda Project. We chose to create Conda Project to foster community involvement, adopt newer standards like conda-lock, and provide a conda-native workflow. A standalone conversion script is provided in this repo at scripts/ap-to-cp.py. You can run it as follows. By default it will write Conda Project files into your current working directory. You can read anaconda-project.yml file from any other directory or output Conda Project files to any other directory.

You’ll need pydantic and ruamel.yaml installed.

python ap-to-cp.py /path/to/anaconda-project.yml [/output/directory]

Installation#

You can install conda-project using the conda package manager:

conda install -c conda-forge conda-project

Quick start#

Let’s start a new project using Python, Pandas, and Jupyter Notebooks. The commands below will work on terminals in Mac, Linux, and Windows. For Windows you can use either cmd.exe or Powershell.

We first create a directory and initialize a new project, which will create a new conda environment and lock the dependencies:

(base) > conda project init --directory my-project python=3.9 notebook pandas
Locking dependencies for environment default on platforms osx-64, osx-arm64, linux-64, win-64: done
Project created at /Users/adefusco/Development/conda-incubator/conda-project/examples/my-project

The goal of Conda Project is to maintain a conda enviroment specifically for the new my-project directory. You’ll see that this directory contains it’s own environment.yml file a Conda Lock file and a conda-project.yml file. You can learn more about these files in the User Guide

(base) > tree ./
├── conda-project.yml
├── default.conda-lock.yml
├── environment.yml

You can activate the environment, which will install packages locally to this project according to the lock file. Notice that after running conda project activate the shell prompt switches to (default), which is the name of the local environment for this project.

(base) > cd my-project
(base) > conda project activate

Downloading and Extracting Packages


Downloading and Extracting Packages

Preparing transaction: done
Verifying transaction: done
Executing transaction: done
environment created at /Users/adefusco/Development/conda-incubator/conda-project/examples/my-project/envs/default
## Project environment default activated in a new shell.
## Exit this shell to de-activate.

And in the activated environment you can launch editors or run commands. For example, since we included the notebook package we can launch Jupyter Notebook from the activated environment:

(default) > jupyter notebook
[I 12:23:03.632 NotebookApp] Serving notebooks from local directory: /Users/adefusco/Development/conda-incubator/conda-project/examples/my-project
[I 12:23:03.632 NotebookApp] Jupyter Notebook 6.5.2 is running at:
[I 12:23:03.632 NotebookApp] http://localhost:8888/?token=1208a3441039526c03b44c233f07436321ad4fd3cced443d
[I 12:23:03.632 NotebookApp]  or http://127.0.0.1:8888/?token=1208a3441039526c03b44c233f07436321ad4fd3cced443d
[I 12:23:03.632 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[C 12:23:03.635 NotebookApp]

Continue reading the User Guide to learn more.

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