Automate Python project setup and development tasks that are otherwise performed manually.

usethis knows about popular Python tools, workflows and frameworks, and knows how they interact. It can declaratively add and remove tools, configure them, and set up the project for you. It does this all in a way that won't break your existing configuration and will make the necessary adjustments to your project configuration files.

usethis gives detailed messages about what it is doing (and what you need to do next).

• Output beginning with ✔ represents a task which usethis has automated.
• Output beginning with ☐ represents a task which you need to perform manually.
• Output beginning with ℹ gives hints and tips.

Inspired by an R package of the same name, this package brings a similar experience to the Python ecosystem as a CLI tool.

• 🧰 First-class support for state-of-the-practice tooling: uv, Ruff, pytest, pre-commit, and many more.
• 🤖 Automatically add and remove tools: declare, install, and configure in one step.
• 🧠 Powerful knowledge of how different tools interact and sensible defaults.
• 🔄 Update existing configuration files automatically.
• 📢 Fully declarative project configuration.
• ⚡ Get started on a new Python project or a new workflow in seconds.

First, it is strongly recommended you install the uv package manager: this is a simple, documented process. If you're already using uv, make sure you're using at least version v0.5.29 (run uv version to check, and uv self update to upgrade).

You can install usethis directly into the project environment:

# With uv
$ uv add --dev usethis

# With pip
$ pip install usethis

Alternatively, you can also run usethis commands in isolation, using uvx or pipx. For example, to add Ruff to the project:

# With uv
$ uvx usethis tool ruff

# With pipx
$ pipx run usethis tool ruff

• usethis init — Initialize a new project with recommended defaults.

• usethis format — Add/Configure recommended formatters (namely, Ruff and pyproject-fmt).
• usethis lint — Add/Configure recommended linters (namely, Ruff and deptry).
• usethis spellcheck — Add/Configure recommended spellcheckers (namely, codespell).
• usethis test — Add/Configure a recommended testing framework (namely, pytest).
• usethis ci — Add/Configure a recommended CI service.
• usethis tool — Add/Configure specific tools individually.

• usethis author — Set new author information for the project.
• usethis docstyle — Set new author information for the project.
• usethis rule — Set a docstring style convention for the project, and enforce it with Ruff.
• usethis status — Set the development status of the project (via trove classifiers).

• usethis badge — Set new author information for the project.
• usethis readme — Add badges to the README file.

• usethis list — Display a table of all available tools and their current usage status.
• usethis version — Display the current version of usethis.
• usethis browse pypi — Display or open the PyPI landing page associated with another project.
• usethis show — Show a specific piece of information about the project.

To start a new project from scratch with a complete set of recommended tooling, run:

$ uvx usethis init
✔ Writing 'pyproject.toml' and initializing project.
✔ Writing 'README.md'.
☐ Populate 'README.md' to help users understand the project.
✔ Adding recommended linters.
☐ Run 'uv run ruff check --fix' to run the Ruff linter with autofixes.
☐ Run 'uv run deptry src' to run deptry.
✔ Adding recommended formatters.
☐ Run 'uv run ruff format' to run the Ruff formatter.
☐ Run 'uv run pyproject-fmt pyproject.toml' to run pyproject-fmt.
✔ Adding recommended spellcheckers.
☐ Run 'uv run codespell' to run the Codespell spellchecker.
✔ Adding recommended test frameworks.
☐ Add test files to the '/tests' directory with the format 'test_*.py'.
☐ Add test functions with the format 'test_*()'.
☐ Run 'uv run pytest' to run the tests.

To use Ruff on an existing project, run:

$ uvx usethis tool ruff
✔ Adding dependency 'ruff' to the 'dev' group in 'pyproject.toml'.
✔ Adding Ruff config to 'pyproject.toml'.
✔ Selecting Ruff rules 'A', 'C4', 'E4', 'E7', 'E9', 'F', 'FLY', 'FURB', 'I', 'PLE', 'PLR', 'RUF', 'SIM', 'UP' in 'pyproject.toml'.
✔ Ignoring Ruff rules 'PLR2004', 'SIM108' in 'pyproject.toml'.
☐ Run 'uv run ruff check --fix' to run the Ruff linter with autofixes.
☐ Run 'uv run ruff format' to run the Ruff formatter.

To use pytest, run:

$ uvx usethis tool pytest
✔ Adding dependency 'pytest' to the 'test' group in 'pyproject.toml'.
✔ Adding pytest config to 'pyproject.toml'.
✔ Selecting Ruff rule 'PT' in 'pyproject.toml'.
✔ Creating '/tests'.
✔ Writing '/tests/conftest.py'.
☐ Add test files to the '/tests' directory with the format 'test_*.py'.
☐ Add test functions with the format 'test_*()'.
☐ Run 'uv run pytest' to run the tests.

To configure Bitbucket pipelines, run:

$ uvx usethis ci bitbucket
✔ Writing 'bitbucket-pipelines.yml'.
✔ Adding cache 'uv' definition to 'bitbucket-pipelines.yml'.
✔ Adding 'Run Ruff' to default pipeline in 'bitbucket-pipelines.yml'.
✔ Adding 'Test on 3.12' to default pipeline in 'bitbucket-pipelines.yml'.
✔ Adding 'Test on 3.13' to default pipeline in 'bitbucket-pipelines.yml'.
☐ Run your pipeline via the Bitbucket website.

Initialize a new Python project with recommended defaults, including:

• a pyproject.toml file and relevant configuration,
• recommended linters, formatters, spellcheckers, and test frameworks (all opt-out),
• docstring style enforcement (opt-in),
• the pre-commit framework (opt-in),
• CI services (opt-in),
• declared & installed dependencies via uv add, and
• any other relevant directories or tool-bespoke configuration files.

Supported options:

• --format to add recommended formatters (default; or --no-format to opt-out)
• --lint to add recommended linters (default; or --no-lint to opt-out)
• --spellcheck to add a recommended spellchecker (default; or --no-spellcheck to opt-out)
• --test to add a recommended testing framework (default; or --no-test to opt-out)
• --pre-commit to add the pre-commit framework for git hooks (but the default is --no-pre-commit)
• --ci to add a CI service configuration Possible values:
  • bitbucket for Bitbucket Pipelines
• --docstyle to set a docstring style convention for the project Possible values:
  • numpy for NumPy docstring style
  • google for Google docstring style
  • pep257 for PEP 257 docstring style
• --status to set the development status of the project. Defaults to planning. Possible values:
  • planning or 1 for "Development Status :: 1 - Planning"
  • pre-alpha or 2 for "Development Status :: 2 - Pre-Alpha"
  • alpha or 3 for "Development Status :: 3 - Alpha"
  • beta or 4 for "Development Status :: 4 - Beta"
  • production or 5 for "Development Status :: 5 - Production/Stable"
  • mature or 6 for "Development Status :: 6 - Mature"
  • inactive or 7 for "Development Status :: 7 - Inactive"
• --offline to disable network access and rely on caches
• --quiet to suppress output
• --frozen to leave the virtual environment and lockfile unchanged (i.e. do not install dependencies, nor update lockfiles)

Add recommended formatters to the project (namely, Ruff and pyproject-fmt), including:

• declared & installed dependencies via uv add,
• relevant pyproject.toml configuration, and
• any other relevant directories or tool-bespoke configuration files.

Note if pyproject.toml is not present, it will be created, since this is required for declaring dependencies via uv add.

Supported options:

• --remove to remove the tool instead of adding it
• --how to only print how to use the tool, with no other side effects
• --offline to disable network access and rely on caches
• --frozen to leave the virtual environment and lockfile unchanged
• --quiet to suppress output

See usethis tool for more information.

Add recommended linters to the project (namely, Ruff and deptry), including:

• declared & installed dependencies with uv add,
• relevant pyproject.toml configuration, and
• any other relevant directories or tool-bespoke configuration files.

Note if pyproject.toml is not present, it will be created, since this is required for declaring dependencies with uv add.

Supported options:

• --remove to remove the tool instead of adding it
• --how to only print how to use the tool, with no other side effects
• --offline to disable network access and rely on caches
• --frozen to leave the virtual environment and lockfile unchanged
• --quiet to suppress output

See usethis tool for more information.

Add a recommended spellchecker to the project (namely, codespell), including:

• declared & installed dependencies with uv add,
• relevant pyproject.toml configuration, and
• any other relevant directories or tool-bespoke configuration files.

Note if pyproject.toml is not present, it will be created, since this is required for declaring dependencies with uv add.

Supported options:

• --remove to remove the tool instead of adding it
• --how to only print how to use the tool, with no other side effects
• --offline to disable network access and rely on caches
• --frozen to leave the virtual environment and lockfile unchanged
• --quiet to suppress output

See usethis tool for more information.

Add a recommended testing framework to the project (namely pytest), including:

• declared & installed dependencies with uv add,
• relevant pyproject.toml configuration, and
• any other relevant directories or tool-bespoke configuration files.

Note if pyproject.toml is not present, it will be created, since this is required for declaring dependencies with uv add.

Supported options:

• --remove to remove the tool instead of adding it
• --how to only print how to use the tool, with no other side effects
• --offline to disable network access and rely on caches
• --frozen to leave the virtual environment and lockfile unchanged
• --quiet to suppress output

See usethis tool for more information.

Add a new tool to a Python project, including:

• declared & installed dependencies with uv add,
• relevant pyproject.toml configuration,
• any other relevant directories or tool-bespoke configuration files, and
• .pre-commit-config.yaml configuration if using pre-commit.

Note if pyproject.toml is not present, it will be created, since this is required for declaring dependencies with uv add.

• usethis tool codespell - Use the codespell spellchecker: detect common spelling mistakes.
• usethis tool deptry - Use the deptry linter: avoid missing or superfluous dependency declarations.
• usethis tool import-linter - Use Import Linter: enforce a self-imposed architecture on imports.
• usethis tool pre-commit - Use the pre-commit framework to manage and maintain pre-commit hooks.
• usethis tool pyproject-fmt - Use the pyproject-fmt linter: opinionated formatting of 'pyproject.toml' files.
• usethis tool ruff - Use Ruff: an extremely fast Python linter and code formatter.

• usethis tool coverage.py - Use Coverage.py: a code coverage measurement tool.
• usethis tool pytest - Use the pytest testing framework.

• usethis tool pyproject.toml - Use a pyproject.toml file to configure the project.
• usethis tool requirements.txt - Use a requirements.txt file exported from the uv lockfile.

Supported options:

• --remove to remove the tool instead of adding it
• --how to only print how to use the tool, with no other side effects
• --offline to disable network access and rely on caches
• --frozen to leave the virtual environment and lockfile unchanged
• --quiet to suppress output

For usethis tool ruff, in addition to the above options, you can also specify:

• --linter to add or remove specifically the linter component of Ruff (default; or --no-linter to opt-out)
• --formatter to add or remove specifically the formatter component of Ruff (default; or --no-formatter to opt-out)

Add Continuous Integration pipelines to the project.

Currently supported platforms:

• usethis ci bitbcuket - Use Bitbucket Pipelines: a CI/CD service for Bitbucket.

Supported options:

• --remove to remove the CI configuration instead of adding it
• --offline to disable network access and rely on caches
• --quiet to suppress output

Add badges to the README file.

Currently supported badges:

• usethis badge pre-commit -
• usethis badge pypi -
• usethis badge ruff -
• usethis badge usethis -
• usethis badge uv -

Supported options:

• --show to show the badge URL instead of adding (or removing) it
• --remove to remove the badge instead of adding it
• --offline to disable network access and rely on caches
• --quiet to suppress output

Add a README.md file to the project.

Supported options:

• --quiet to suppress output
• --badges to also add badges to the README.md file

Set new author information for the project.

Required options:

• --name for the new author's name

Other supported options:

• --email to set the author email address
• --overwrite to overwrite all existing author information
• --quiet to suppress output

Set a docstring style convention for the project, and enforce it with Ruff.

Defaults to the Google docstring style.

Possible style options:

• numpy for NumPy docstring style
• google for Google docstring style
• pep257 for PEP 257 docstring style

Example:

usethis docstyle google

Supported options:

• --quiet to suppress output

Add (or manage configuration) of Ruff and Deptry rules in pyproject.toml.

See the Ruff documentation for a list of available rules, and the Deptry documentation for a list of available rules.

Example:

usethis rule RUF001

Supported options:

• --remove to remove the rule selection or ignore status.
• --ignore to add the rule to the ignore list (or remove it if --remove is specified).
• --offline to disable network access and rely on caches
• --quiet to suppress output

Set the development status of the project via trove classifiers.

Possible values (required):

• usethis status planning or usethis status 1 for "Development Status :: 1 - Planning"
• usethis status pre-alpha or usethis status 2 for "Development Status :: 2 - Pre-Alpha"
• usethis status alpha or usethis status 3 for "Development Status :: 3 - Alpha"
• usethis status beta or usethis status 4 for "Development Status :: 4 - Beta"
• usethis status production or usethis status 5 for "Development Status :: 5 - Production/Stable"
• usethis status mature or usethis status 6 for "Development Status :: 6 - Mature"
• usethis status inactive or usethis status 7 for "Development Status :: 7 - Inactive"

Supported options:

• --quiet to suppress output
• --badges to add an associated badge to the README file

Display a table of all available tools and their current usage status.

Display the current version of usethis.

Show a piece of information about the project.

Currently supported subcommands:

• usethis show name to show the name of the project.
• usethis show sonarqube to show appropriate contents of a sonar-projects.properties file for SonarQube analysis.

Display or open the PyPI landing page associated with another project.

Example:

usethis browse pypi numpy

Supported options:

• --browser to open the link in the browser automatically.

Not sure if usethis is the exact fit for your project?

The closest match to usethis is PyScaffold. It provides a Command Line Interface to automate the creation of a project from a sensible templated structure.

You could also consider your own hard-coded template. Templating tools such as Cookiecutter and Copier allow you to create static templates with fixed configuration you can use across multiple projects. However, it's not always obvious which template you should use, and many do not use state-of-practice tooling such as pyproject.toml. Also, sometimes a template can overwhelm you with too many unfamiliar tools.

You could consider this template or this one, which work with Copier, or this template which works with Cookiecutter.

If you're using Cookiecutter, then you can update to a latest version of a template using a tool like cruft. Copier has inbuilt support for template updating. Another template-style option which provides updating is jaraco/skeleton, which is a specific, git-based template rather than a general templating system.

Major features planned for later in 2025 are:

• Support for users who aren't using uv, e.g. poetry users,
• Support for automated GitHub Actions workflows (#57),
• Support for a typechecker (likely Pyright, #121), and
• Support for documentation pages (likely using mkdocs, #188).

Other features are tracked in the GitHub Issues page.

See the CONTRIBUTING.md file.

usethis is licensed under the MIT license (LICENSE or https://opensource.org/licenses/MIT)

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in usethis by you, as defined in the Apache License, Version 2.0, (https://www.apache.org/licenses/LICENSE-2.0), shall be licensed under the MIT license, without any additional terms or conditions.