A modern Python package and dependency manager supporting the latest PEP standards
Project description
What is PDM?
PDM is meant to be a next generation Python package management tool.
It was originally built for personal use. If you feel you are going well
with Pipenv or Poetry and don't want to introduce another package manager,
just stick to it. But if you are missing something that is not present in those tools,
you can probably find some goodness in pdm.
Highlights of features
- Opt-in PEP 582 support, no virtualenv involved at all.
- Simple and fast dependency resolver, mainly for large binary distributions.
- A PEP 517 build backend.
- PEP 621 project metadata.
- Flexible and powerful plug-in system.
- Versatile user scripts.
- Opt-in centralized installation cache like pnpm.
Comparisons to other alternatives
Pipenv
Pipenv is a dependency manager that combines pip and venv, as the name implies.
It can install packages from a non-standard Pipfile.lock or Pipfile.
However, Pipenv does not handle any packages related to packaging your code,
so it’s useful only for developing non-installable applications (Django sites, for example).
If you’re a library developer, you need setuptools anyway.
Poetry
Poetry manages environments and dependencies in a similar way to Pipenv,
but it can also build .whl files with your code, and it can upload wheels and source distributions to PyPI.
It has a pretty user interface and users can customize it via a plugin. Poetry uses the pyproject.toml standard,
but it does not follow the standard specifying how metadata should be represented in a pyproject.toml file (PEP 621),
instead using a custom [tool.poetry] table. This is partly because Poetry came out before PEP 621.
Hatch
Hatch can also manage environments (it allows multiple environments per project, but it does not allow to put them in the project directory), and it can manage packages (but without lockfile support). Hatch can also be used to package a project (with PEP 621-compliant pyproject.toml files) and upload it to PyPI.
This project
PDM also can manage venvs, both in project and centralized location as Pipenv does. It reads the project metadata from a standardized pyproject.toml file, and has lockfile support. Users can add more functionalities in a plugin and upload it as a distribution for sharing.
Besides, PDM has an experimental PEP 582 support(docs), which means you can install packages without creating a virtual environment. Moreover, unlike Poetry and Hatch, PDM isn't locked to a specific build backend, you can choose any build backend you like.
Installation
PDM requires python version 3.7 or higher.
Via Install Script
Like Pip, PDM provides an installation script that will install PDM into an isolated environment.
For Linux/Mac
curl -sSL https://raw.githubusercontent.com/pdm-project/pdm/main/install-pdm.py | python3 -
For Windows
(Invoke-WebRequest -Uri https://raw.githubusercontent.com/pdm-project/pdm/main/install-pdm.py -UseBasicParsing).Content | python -
For security reasons, you should verify the checksum of install-pdm.py.
The sha256 checksum is: ce0a116987b2667231391d13dd005006433114033cac74aa18f0b2dec5538d03
The installer will install PDM into the user site and the location depends on the system:
$HOME/.local/binfor Unix%APPDATA%\Python\Scriptson Windows
You can pass additional options to the script to control how PDM is installed:
usage: install-pdm.py [-h] [-v VERSION] [--prerelease] [--remove] [-p PATH] [-d DEP]
optional arguments:
-h, --help show this help message and exit
-v VERSION, --version VERSION | envvar: PDM_VERSION
Specify the version to be installed, or HEAD to install from the main branch
--prerelease | envvar: PDM_PRERELEASE Allow prereleases to be installed
--remove | envvar: PDM_REMOVE Remove the PDM installation
-p PATH, --path PATH | envvar: PDM_HOME Specify the location to install PDM
-d DEP, --dep DEP | envvar: PDM_DEPS Specify additional dependencies, can be given multiple times
You can either pass the options after the script or set the env var value.
Alternative Installation Methods
If you are on MacOS and using homebrew, install it by:
brew install pdm
If you are on Windows and using Scoop, install it by:
scoop bucket add frostming https://github.com/frostming/scoop-frostming.git
scoop install pdm
Otherwise, it is recommended to install pdm in an isolated environment with pipx:
pipx install pdm
Or you can install it under a user site:
pip install --user pdm
With asdf-vm
asdf plugin add pdm
asdf install pdm latest
Quickstart
Initialize a new PDM project
pdm init
Answer the questions following the guide, and a PDM project with a pyproject.toml file will be ready to use.
Install dependencies
pdm add requests flask
You can add multiple dependencies in the same command. After a while, check the pdm.lock file to see what is locked for each package.
Badges
Tell people you are using PDM in your project by including the markdown code in README.md:
[](https://pdm.fming.dev)
Packaging Status
PDM Eco-system
Awesome PDM is a curated list of awesome PDM plugins and resources.
Sponsors
Credits
This project is strongly inspired by pyflow and poetry.
License
This project is open sourced under MIT license, see the LICENSE file for more details.
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