- FAQ about me (including links to talks and interviews)
- Blog (latest post published on 2026-03-26)
- Mastodon (with 3,508 followers)
- Bluesky (with 4,045 followers)
Last updated 2026-04-30.
I have made some commit to 303 projects (some of which I started and are denoted with italics).
(Grouped by commit count.)
≥ 103
≥ 102
- python/peps
- microsoft/vscode-python
- brettcannon/python-launcher
- microsoft/vscode-jupyter
- brettcannon/caniusepython3
- python/devguide
- microsoft/Pyjion
- gidgethub/gidgethub
- brettcannon/oplop
- brettcannon/desugar
- brettcannon/dotconfig
- python/the-knights-who-say-ni
- brettcannon/dotfiles
- pypa/packaging
- brettcannon/free-labour
- Which-Film/which-film.info
≥ 101
- brettcannon/mousebender
- microsoft/pvscbot
- pypa/packaging.python.org
- python/importlib_resources
- PyCQA/modernize
- brettcannon/release-often
- brettcannon/WWBD
- python/bedevere
- brettcannon/trips-history
- brettcannon/cpython-wasi-build
- python/devinabox
- brettcannon/microvenv
- brettcannon/pep425
- brettcannon/check-for-changed-files
- brettcannon/py-pip
- brettcannon/python-azure-web-app-cookiecutter
- brettcannon/stdlib-stats
- brettcannon/mnfy
- microsoft/vscode-docs-archive
- dabeaz/curio
- brettcannon/sans-io
- microsoft/vscode-docs
- brettcannon/modutil
- brettcannon/time-clock
- brettcannon/flatten_filenames
- elixir-lang/elixir-lang.github.com
- brettcannon/find-duplicate-files
- brettcannon/riscv-harmony
- brettcannon/wasi-buildbot
- brettcannon/basicenum
- uranusjr/packaging-metadata-comparisons
- angular/angular.js
- python/cpython-devcontainers
- pypa/setuptools
- python-trio/trio
- dusty-phillips/rescript-zora
- microsoft/vscode-dev-containers
- python/core-workflow
- microsoft/vscode-python-devicesimulator
- Azure-Samples/Azure-MachineLearning-DataScience
- brettcannon/defy-layout-scorer
- github/copilot-sdk
- Azure/msrest-for-python
- brettcannon/record-type
- brettcannon/pip-secure-install
- Azure/msrestazure-for-python
- microsoft/TypeScript-Handbook
- emmatyping/python-wasm
- pypa/distutils
- python-hyper/uritemplate
- python/buildmaster-config
- python/prebuilt-cpython
- orsenthil/cpython-hg-to-git
- brettcannon/feedbin-deduplication
- python-hglib
≥ 100
- lustre-labs/lustre
- python3statement/python3statement.github.io
- benjaminp/six
- beeware/toga
- brettcannon/choose-a-font.dev
- brettcannon/importlib
- dusty-phillips/match-variant
- JuliaLang/julia
- python/steering-council
- python/blurb
- microsoft/vscode-anaconda-extension-pack
- brettcannon/nowhere-on-the-web
- eclipse-archived/ceylon-lang.org
- rescript-lang/rescript-lang.org
- microsoft/vscode-telemetry-extractor
- python/cherry-picker
- brettcannon/porting-to-python-3-notebook
- rust-lang/rust
- Azure/azure-sdk-for-python
- python/planet
- openlawlibrary/pygls
- microsoft/vscode
- micktwomey/pyiso8601
- python/typeshed
- aosabook/500lines
- pypa/pipenv
- Homebrew/legacy-homebrew
- brettcannon/vscode-zephyr-asdl
- cookiecutter/cookiecutter
- github/gitignore
- Homebrew/homebrew-core
- WebAssembly/design
- square/dagger
- vstinner/misc
- thechangelog/show-notes
- jazzband/pip-tools
- inko-lang/inko
- brettcannon/cpython-wasi-buildbot
- microsoft/vscode-wiki
- Mariatta/github-bot-tutorial
- brettcannon/travelbrag
- python/psf-salt
- micropython/micropython
- badges/shields
- dotnet/docs
- huggingface/agents-course
- kushaldas/pep582
- eerhardt/PythonStarter
- astral-sh/ruff
- MPOS/php-mpos
- sarugaku/resolvelib
- microsoftarchive/msgraph-sdk-python
- python/typing
- beeware/liquid-demo
- wntrblm/nox
- fastapi/sqlmodel
- python-hyper/h2
- larryhastings/appeal
- vibora-io/vibora
- WebAssembly/wasi-sdk
- aio-libs/aiohttp
- microsoft/TypeScript-wiki
- asyncio-docs/asyncio-doc
- microsoft/vscode-python-templates
- kushaldas/pym
- microsoft/sql-server-samples
- MeeseeksBox/meeseeksbox.github.io
- bloodyowl/rescript-test
- python/python-docs-theme
- microsoft/vscode-isort
- gleam-lang/website
- conda/ceps
- gleam-lang/otp
- buildout/buildout
- gleam-lang/language-tour
- jaraco/skeleton
- python/core-sprint
- hayleigh-dot-dev/rsvp
- bytecodealliance/wasmtime
- python/pyperformance
- dabeaz/ply
- python/pythonineducation.org
- matplotlib/matplotlib
- pyscript/pyscript
- moby/mobywebsite
- microsoft/vscode-docker
- MicrosoftDocs/visualstudio-docs
- ponylang/pony-tutorial
- rustwasm/book
- microsoft/language-server-protocol
- conda/conda
- progit/progit2
- pypa/flit
- Django
- vscode-restructuredtext/vscode-restructuredtext
- rust-lang/log
- MicrosoftDocs/azure-docs
- pycascades/welcome-wagon-2018
- golang/go
- VSCodeVim/Vim
- ericpalakovichcarr/pytest-pythonpath
- starship/starship
- sphinx-doc/sphinx
- andrew/nesbitt.io
- lsd-rs/lsd
- bagder/http2-explained
- hynek/build-and-inspect-python-package
- bytecodealliance/setup-wasi-sdk-action
- lpil/sqlight
- markshannon/faster-cpython
- pypa/trove-classifiers
- Azure/azure-cli
- extism/extism
- devcontainers/images
- kushaldas/asaman
- chhantyal/py3readiness
- microsoftgraph/python-sample-pagination
- gleam-lang/gleam
- spotify/pedalboard
- ansible/ansible
- PyCQA/pyflakes
- dusty-phillips/macabre
- gitkraken/vscode-gitlens
- python-poetry/tomlkit
- lorenzofox3/zora
- google/yapf
- aurelia/documentation
- syl20bnr/spacemacs
- beeware/podium
- psf/policies
- victor-o-silva/python-links-from-link-header
- conda/conda-build
- rocketreach/rocketreach_python
- pdm-project/pdm
- saschpe/mozilla-plugins
- devcontainers/features
- Lukasa/language-restructuredtext
- cometkim/rescript-vitest
- diogonfs/pyinit
- regebro/supporting-python-3
- w3c/ServiceWorker
- pytest-dev/pytest
- pyvideo/old-pyvideo
- scikit-learn/scikit-learn
- python/importlib_metadata
- beeware/briefcase
- bitbldr/sprocket_docs
- casey/just
- absurdia/absurdia-py
- okken/pytest-srcpaths
- stellar/new-docs
- actions-rs/install
- ebkalderon/tower-lsp
- microsoft/aspire
- mozilla-services/konfig
- 11ty/11ty-website
- mesonbuild/meson
- pypa/setuptools-scm
- cardoe/stderrlog-rs
- palantir/python-language-server
- pyca/pyopenssl
- microsoft/vscode-extension-samples
- modelcontextprotocol/rust-sdk
- Enderchief/gleam-tools
- zwaldowski/match-label-action
- stellar/awesome-stellar
- conda/conda-docs
- GraphQLGuide/book
- pypa/pipx
- microsoft/vscode-tools-for-ai
- clearlydefined/website
- python/mypy
- getsentry/responses
- lustre-labs/ui
- Quansight-Labs/free-threaded-compatibility
- jupyter-book/mystmd.org
- luabud/hello-vscodespaces
- livebook-dev/livebook
- Devid-Ba/Text-adventure
- bungcip/better-toml
- psf/black
- briandealwis/ferret
- topazproject/topaz
- jupyter/notebook
- MagicStack/MagicPython
- microsoft/vscode-pylint
- microsoft/python-sample-vscode-django-tutorial
- pyvideo/data
- vega/ipyvega
- facebook/pyre-check
- google/grumpy
- astral-sh/uv
- brettcannon/character-frequency
- Homebrew/brew
- microsoft/debugpy
- psf/fundable-packaging-improvements
- pablogsal/cpython_leaderboard
- oauthlib/oauthlib
- riscv-software-src/riscv-tests
- jupyterlab/jupyterlab
- psf/webassembly
- score-spec/spec
- reubeno/brush
- Azure/azure-cosmos-python
- stellar-deprecated/docs
- Fyrd/caniuse
- brettcannon/exercism-solutions
- WebAssembly/component-model
- python/pythontestdotnet
- savannahostrowski/doesjitgobrrr
- pypi/warehouse
- rust-lang/rustfmt
- pypa/build
- nayafia/nayafia
- gleam-lang/erlang
- realpython/python-guide
- Azure/azure-functions-python-library
- microsoft/PTVS
- twisted/klein
- gvanrossum/gvanrossum.github.io
- jupyter/jupyter.github.io
- microsoft/az-partner-center-cli
- microsoftgraph/microsoft-graph-docs-contrib
- adafruit/Adafruit_CircuitPython_CircuitPlayground
- PyPy
- defusedexpat
- expat
- Mercurial
- vim
- smol
- world
I have had commit rights for over 23 years (since 2003-04-18 PDT).
In that time I have become the 12th most prolific contributor to CPython.
I have (co-)authored 35/727 PEPs (4.8%).
(Listed from oldest to newest, although I may have become a co-author post-creation.)
| # | Title | Status | Co-authors |
|---|---|---|---|
| 4 | Deprecation of Standard Modules | 🏃 | Martin von Löwis |
| 2 | Procedure for Adding New Modules | 🏃 | Martijn Faassen |
| 11 | CPython platform support | 🏃 | Martin von Löwis |
| 12 | Sample reStructuredText PEP Template | 🏃 | David Goodger, Barry Warsaw |
| 3100 | Miscellaneous Python 3.0 Plans | ✅ | |
| 339 | Design of the CPython Compiler | 🤦 | |
| 348 | Exception Reorganization for Python 3.0 | ❌ | |
| 352 | Required Superclass for Exceptions | ✅ | Guido van Rossum |
| 360 | Externally Maintained Packages | ✅ | |
| 362 | Function Signature Object | ✅ | Jiwon Seo, Yury Selivanov, Larry Hastings |
| 3108 | Standard Library Reorganization | ✅ | |
| 3113 | Removal of Tuple Parameter Unpacking | ✅ | |
| 3122 | Delineation of the main module | ❌ | |
| 374 | Choosing a distributed VCS for the Python project | ✅ | Stephen J. Turnbull, Alexandre Vassalotti, Barry Warsaw, Dirkjan Ochtman |
| 401 | BDFL Retirement | ❌ | Barry Warsaw |
| 3003 | Python Language Moratorium | ✅ | Jesse Noller, Guido van Rossum |
| 399 | Pure Python/C Accelerator Module Compatibility Requirements | ✅ | |
| 512 | Migrating from hg.python.org to GitHub | ✅ | |
| 488 | Elimination of PYO files | ✅ | |
| 518 | Specifying Minimum Build System Requirements for Python Projects | ✅ | Nathaniel J. Smith, Donald Stufft |
| 519 | Adding a file system path protocol | ✅ | Koos Zevenhoven |
| 523 | Adding a frame evaluation API to CPython | ✅ | Dino Viehland |
| 8001 | Python Governance Voting Process | ✅ | Christian Heimes, Donald Stufft, Eric Snow, Gregory P. Smith, Łukasz Langa, Mariatta, Nathaniel J. Smith, Pablo Galindo Salgado, Raymond Hettinger, Tal Einat, Tim Peters, Zachary Ware |
| 594 | Removing dead batteries from the standard library | ✅ | Christian Heimes |
| 621 | Storing project metadata in pyproject.toml | ✅ | Dustin Ingram, Paul Ganssle, Pradyun Gedam, Sébastien Eustace, Thomas Kluyver, Tzu-ping Chung |
| 650 | Specifying Installer Requirements for Python Projects | 🤦 | Vikram Jayanthi, Dustin Ingram |
| 641 | Using an underscore in the version portion of Python 3.10 compatibility tags | ❌ | Steve Dower, Barry Warsaw |
| 665 | A file format to list Python dependencies for reproducibility of an application | ❌ | Pradyun Gedam, Tzu-ping Chung |
| 685 | Comparison of extra names for optional distribution dependencies | ✅ | |
| 751 | A file format to record Python dependencies for installation reproducibility | ✅ | |
| 758 | Allow ``except`` and ``except*`` expressions without parentheses | ✅ | Pablo Galindo Salgado |
| 760 | No More Bare Excepts | 🤦 | Pablo Galindo Salgado |
| 794 | Import Name Metadata | 👍 | |
| 816 | WASI Support | 🏃 | |
| 832 | Virtual environment discovery | ✍ |
I'm the 4th most prolific PEP author.
- Alyssa Coghlan (53)
- Guido van Rossum (49)
- Barry Warsaw (45)
- Victor Stinner (35)
- Brett Cannon (35)
- Donald Stufft (23)
- Petr Viktorin (21)
- Martin von Löwis (17)
- Steve Dower (16)
- Łukasz Langa (15)
- Pablo Galindo Salgado (15)
- Nathaniel J. Smith (15)
- Raymond Hettinger (14)
- Antoine Pitrou (13)
- Mark Shannon (12)
- Eric Snow (12)
- Tim Peters (11)
- Georg Brandl (11)
- William Woodruff (10)
- A.M. Kuchling (10)
- Yury Selivanov (9)
- Pradyun Gedam (9)
- Paul Moore (9)
- Marc-André Lemburg (9)
- Ee Durbin (9)
- Thomas Wouters (8)
- Larry Hastings (8)
- Jelle Zijlstra (8)
- Ivan Levkivskyi (8)
- Christian Heimes (8)
- Moshe Zadka (7)
- Jeremy Hylton (7)
- Inada Naoki (7)
- Dustin Ingram (7)
- Benjamin Peterson (7)
- Tzu-ping Chung (6)
- Phillip J. Eby (6)
- Ka-Ping Yee (6)
- Jim J. Jewett (6)
- Emma Harper Smith (6)
- David Goodger (6)
- Daniel Holth (6)
- Collin Winter (6)
- Chris Angelico (6)
- Brandt Bucher (6)
- Talin (5)
- Skip Montanaro (5)
- Ralf Gommers (5)
- Neil Schemenauer (5)
- Irit Katriel (5)
- Ethan Furman (5)
- Eric Traut (5)
- Anthony Baxter (5)
- Zac Hatfield-Dodds (4)
- Thomas Kluyver (4)
- Tarek Ziadé (4)
- Savannah Ostrowski (4)
- Richard Jones (4)
- Pradeep Kumar Srinivasan (4)
- Paul Prescod (4)
- Ofek Lev (4)
- Michael Sarahan (4)
- Mariatta (4)
- Lysandros Nikolaou (4)
- Jukka Lehtosalo (4)
- Jeroen Demeyer (4)
- Gregory P. Smith (4)
- Gregory Ewing (4)
- Eric V. Smith (4)
- Carl Meyer (4)
- Travis Oliphant (3)
- Steven D'Aprano (3)
- Steven Bethard (3)
- Shantanu Jain (3)
- Sergey B Kirpichev (3)
- Peter Bierma (3)
- Neal Norwitz (3)
- Michel Pelletier (3)
- Michał Górny (3)
- Michael Hudson (3)
- Konstantin Schütze (3)
- Jonathan Dekhtiar (3)
- Jeffrey Yasskin (3)
- James Hilton-Balfe (3)
- Hugo van Kemenade (3)
- Hood Chatham (3)
- Filipe Laíns (3)
- Facundo Tuesca (3)
- Ewa Jodlowska (3)
- Erlend Egeberg Aasland (3)
- Eli Bendersky (3)
- Carol Willing (3)
- Batuhan Taskaya (3)
- Armin Ronacher (3)
- Alex Martelli (3)
- Vladimir Diaz (2)
- Vinay Sajip (2)
- Trishank Karthik Kuppusamy (2)
- Tobias Kohn (2)
- Tim Delaney (2)
- Terry Reedy (2)
- Tal Einat (2)
- Stéphane Bidoul (2)
- Steven Troxler (2)
- Stephen J. Turnbull (2)
- Stefano Borini (2)
- Stefan Behnel (2)
- Stan Ulbrych (2)
- Shannon Zhu (2)
- Seth Michael Larson (2)
- Serhiy Storchaka (2)
- Sam Gross (2)
- Ronald Oussoren (2)
- Robert Collins (2)
- Paul Ganssle (2)
- Oleg Broytman (2)
- Nick Humrich (2)
- Ned Deily (2)
- Miro Hrončok (2)
- Michael J. Sullivan (2)
- Mark Mendoza (2)
- Mark Hammond (2)
- Mark E. Haase (2)
- Mario Corchero (2)
- Marina Moore (2)
- Marcel Plch (2)
- Magnus Lie Hetland (2)
- Maggie Moss (2)
- Koos Zevenhoven (2)
- Ken Jin (2)
- Justin Cappos (2)
- Josiah Carlson (2)
- Joe Carey (2)
- Jesse Noller (2)
- Jaime Rodríguez-Guerra (2)
- Jack Jansen (2)
- Greg Wilson (2)
- Greg Stein (2)
- Gordon McMillan (2)
- Germán Méndez Bravo (2)
- Geoffrey Thomas (2)
- Fred L. Drake, Jr. (2)
- Facundo Batista (2)
- Erik De Bonte (2)
- Eli Uriegas (2)
- Donghee Na (2)
- Dirkjan Ochtman (2)
- Dino Viehland (2)
- David Foster (2)
- David Ascher (2)
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- Daniel F Moisset (2)
- Cory Benfield (2)
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- Christopher A. Craig (2)
- Charlie Marsh (2)
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- Andy R. Terrel (2)
- Andrey Talman (2)
- Alexander Belopolsky (2)
- Alex Gaynor (2)
- Adam Turner (2)
- Aahz (2)
- Łukasz Modzelewski (1)
- Zixuan James Li (1)
- Zachary Ware (1)
- Wenzel Jakob (1)
- Walter Dörwald (1)
- W Isaac Carroll (1)
- Vincent Siles (1)
- Vikram Jayanthi (1)
- Victorien Plot (1)
- Trent Mick (1)
- Tony Lownds (1)
- Tomáš Orsava (1)
- Todd Rovito (1)
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- Tim Felgentreff (1)
- Till Varoquaux (1)
- Tian Gao (1)
- Thomas Robitaille (1)
- Thomas Heller (1)
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- The Python core team and community (1)
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- Terence Way (1)
- Taneli Hukkinen (1)
- Sébastien Eustace (1)
- Sumana Harihareswara (1)
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- Stephen Rosen (1)
- Stepan Sindelar (1)
- Stepan Koltsov (1)
- Stefano Rivera (1)
- Stefan Krah (1)
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- Seth Larson (1)
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2/8
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