Biographical Links

• FAQ about me (including links to talks and interviews)
• Blog (latest post published on 2025-03-07)
• Mastodon (with 3,403 followers)
• Bluesky (with 3,602 followers)

Open Source

Last updated 2025-05-07.

Contributions

I have made some commit to 283 projects (some of which I started and are denoted with italics).

(Grouped by commit count.)

≥ 10³

1. python/cpython

≥ 10²

1. python/peps
2. microsoft/vscode-python
3. brettcannon/python-launcher
4. microsoft/vscode-jupyter
5. brettcannon/caniusepython3
6. python/devguide
7. microsoft/Pyjion
8. gidgethub/gidgethub
9. brettcannon/oplop
10. brettcannon/desugar
11. brettcannon/dotconfig
12. python/the-knights-who-say-ni
13. brettcannon/free-labour
14. brettcannon/travelbrag
15. pypa/packaging
16. brettcannon/dotfiles
17. Which-Film/which-film.info

≥ 10¹

1. microsoft/pvscbot
2. brettcannon/mousebender
3. python/importlib_resources
4. PyCQA/modernize
5. brettcannon/release-often
6. python/bedevere
7. python/devinabox
8. brettcannon/WWBD
9. brettcannon/trips-history
10. brettcannon/pep425
11. brettcannon/microvenv
12. brettcannon/check-for-changed-files
13. brettcannon/py-pip
14. pypa/packaging.python.org
15. brettcannon/python-azure-web-app-cookiecutter
16. brettcannon/stdlib-stats
17. brettcannon/cpython-wasi-build
18. brettcannon/mnfy
19. microsoft/vscode-docs-archive
20. dabeaz/curio
21. microsoft/vscode-docs
22. brettcannon/sans-io
23. brettcannon/modutil
24. brettcannon/time-clock
25. brettcannon/find-duplicate-files
26. elixir-lang/elixir-lang.github.com
27. brettcannon/riscv-harmony
28. brettcannon/flatten_filenames
29. brettcannon/basicenum
30. uranusjr/packaging-metadata-comparisons
31. angular/angular.js
32. pypa/setuptools
33. python-trio/trio
34. dusty-phillips/rescript-zora
35. python/core-workflow
36. microsoft/vscode-dev-containers
37. microsoft/vscode-python-devicesimulator
38. Azure-Samples/Azure-MachineLearning-DataScience
39. brettcannon/record-type
40. Azure/msrest-for-python
41. brettcannon/pip-secure-install
42. python-hyper/uritemplate
43. Azure/msrestazure-for-python
44. microsoft/TypeScript-Handbook
45. pypa/distutils
46. emmatyping/python-wasm
47. brettcannon/defy-layout-scorer
48. orsenthil/cpython-hg-to-git
49. python/buildmaster-config
50. python-hglib

≥ 10⁰

1. benjaminp/six
2. python3statement/python3statement.github.io
3. python/steering-council
4. brettcannon/importlib
5. brettcannon/choose-a-font.dev
6. dusty-phillips/match-variant
7. JuliaLang/julia
8. lustre-labs/lustre
9. microsoft/vscode-anaconda-extension-pack
10. python/blurb
11. microsoft/vscode-telemetry-extractor
12. brettcannon/nowhere-on-the-web
13. eclipse-archived/ceylon-lang.org
14. rescript-lang/rescript-lang.org
15. brettcannon/porting-to-python-3-notebook
16. beeware/toga
17. python/cherry-picker
18. Azure/azure-sdk-for-python
19. openlawlibrary/pygls
20. microsoft/vscode
21. rust-lang/rust
22. python/planet
23. micktwomey/pyiso8601
24. python/typeshed
25. square/dagger
26. Homebrew/legacy-homebrew
27. WebAssembly/design
28. aosabook/500lines
29. brettcannon/vscode-zephyr-asdl
30. cookiecutter/cookiecutter
31. Homebrew/homebrew-core
32. github/gitignore
33. pypa/pipenv
34. inko-lang/inko
35. micropython/micropython
36. vstinner/misc
37. python/psf-salt
38. Mariatta/github-bot-tutorial
39. badges/shields
40. thechangelog/show-notes
41. jazzband/pip-tools
42. brettcannon/cpython-wasi-buildbot
43. dotnet/docs
44. microsoft/vscode-wiki
45. rustwasm/book
46. progit/progit2
47. jaraco/skeleton
48. dabeaz/ply
49. buildout/buildout
50. beeware/liquid-demo
51. microsoft/vscode-python-templates
52. bloodyowl/rescript-test
53. microsoft/TypeScript-wiki
54. python/pyperformance
55. riverscuomo/apps
56. python/pythonineducation.org
57. moby/mobywebsite
58. huggingface/agents-course
59. microsoft/sql-server-samples
60. kushaldas/pym
61. python/python-docs-theme
62. astral-sh/ruff
63. ponylang/pony-tutorial
64. microsoft/language-server-protocol
65. WebAssembly/wasi-sdk
66. nayafia/nayafia
67. python-hyper/h2
68. microsoft/vscode-isort
69. conda/conda
70. microsoft/vscode-docker
71. conda/ceps
72. gleam-lang/language-tour
73. MPOS/php-mpos
74. fastapi/sqlmodel
75. vibora-io/vibora
76. sarugaku/resolvelib
77. larryhastings/appeal
78. MeeseeksBox/meeseeksbox.github.io
79. asyncio-docs/asyncio-doc
80. python/typing
81. pypa/flit
82. bytecodealliance/wasmtime
83. pyscript/pyscript
84. python/core-sprint
85. kushaldas/pep582
86. MicrosoftDocs/visualstudio-docs
87. matplotlib/matplotlib
88. microsoftarchive/msgraph-sdk-python
89. aio-libs/aiohttp
90. Django
91. clearlydefined/website
92. wntrblm/nox
93. psf/fundable-packaging-improvements
94. rust-lang/rustfmt
95. chhantyal/py3readiness
96. microsoft/debugpy
97. gleam-lang/website
98. mesonbuild/meson
99. diogonfs/pyinit
100. microsoft/vscode-extension-samples
101. getsentry/responses
102. cometkim/rescript-vitest
103. 11ty/11ty-website
104. google/grumpy
105. Azure/azure-cli
106. microsoft/vscode-tools-for-ai
107. python-poetry/tomlkit
108. scikit-learn/scikit-learn
109. pycascades/welcome-wagon-2018
110. cardoe/stderrlog-rs
111. psf/black
112. extism/extism
113. VSCodeVim/Vim
114. riscv-software-src/riscv-tests
115. conda/conda-build
116. Lukasa/language-restructuredtext
117. GraphQLGuide/book
118. livebook-dev/livebook
119. absurdia/absurdia-py
120. bagder/http2-explained
121. MagicStack/MagicPython
122. rust-lang/log
123. rocketreach/rocketreach_python
124. okken/pytest-srcpaths
125. oauthlib/oauthlib
126. pyvideo/old-pyvideo
127. devcontainers/features
128. saschpe/mozilla-plugins
129. realpython/python-guide
130. stellar/awesome-stellar
131. jupyter/jupyter.github.io
132. Quansight-Labs/free-threaded-compatibility
133. sphinx-doc/sphinx
134. psf/webassembly
135. gleam-lang/gleam
136. syl20bnr/spacemacs
137. vscode-restructuredtext/vscode-restructuredtext
138. regebro/supporting-python-3
139. pypa/setuptools-scm
140. google/yapf
141. Homebrew/brew
142. adafruit/Adafruit_CircuitPython_CircuitPlayground
143. MicrosoftDocs/azure-docs
144. lorenzofox3/zora
145. Devid-Ba/Text-adventure
146. bungcip/better-toml
147. Fyrd/caniuse
148. microsoft/PTVS
149. WebAssembly/component-model
150. riverscuomo/new-albums
151. Enderchief/gleam-tools
152. luabud/hello-vscodespaces
153. pytest-dev/pytest
154. devcontainers/images
155. facebook/pyre-check
156. pypa/pipx
157. jupyter-book/mystmd.org
158. gleam-lang/otp
159. jupyterlab/jupyterlab
160. vega/ipyvega
161. kushaldas/asaman
162. pypa/build
163. gitkraken/vscode-gitlens
164. Azure/azure-functions-python-library
165. conda/conda-docs
166. pyvideo/data
167. microsoft/az-partner-center-cli
168. spotify/pedalboard
169. microsoftgraph/python-sample-pagination
170. w3c/ServiceWorker
171. python/importlib_metadata
172. aurelia/documentation
173. pablogsal/cpython_leaderboard
174. bitbldr/sprocket_docs
175. astral-sh/uv
176. actions-rs/install
177. jupyter/notebook
178. topazproject/topaz
179. lustre-labs/ui
180. zwaldowski/match-label-action
181. PyCQA/pyflakes
182. score-spec/spec
183. microsoft/vscode-pylint
184. golang/go
185. mozilla-services/konfig
186. pdm-project/pdm
187. markshannon/faster-cpython
188. casey/just
189. ericpalakovichcarr/pytest-pythonpath
190. dusty-phillips/macabre
191. brettcannon/character-frequency
192. ansible/ansible
193. Azure/azure-cosmos-python
194. ebkalderon/tower-lsp
195. microsoft/python-sample-vscode-django-tutorial
196. briandealwis/ferret
197. victor-o-silva/python-links-from-link-header
198. palantir/python-language-server
199. pypa/trove-classifiers
200. stellar/new-docs
201. microsoftgraph/microsoft-graph-docs-contrib
202. pypi/warehouse
203. python/pythontestdotnet
204. stellar-deprecated/docs
205. starship/starship
206. pyca/pyopenssl
207. twisted/klein
208. python/mypy
209. hynek/build-and-inspect-python-package
210. PyPy
211. defusedexpat
212. expat
213. Mercurial
214. vim
215. smol

Python

Core Development

I have had commit rights for over 22 years (since 2003-04-18 PDT).

In that time I have become the 12th most prolific contributor to CPython.

Python Enhancement Proposals

I have (co-)authored 32 PEPs.

(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
760	No More Bare Excepts	🤦	Pablo Galindo

I'm the 5th most prolific PEP author.

1. Alyssa Coghlan (53)
2. Guido van Rossum (49)
3. Barry Warsaw (41)
4. Victor Stinner (34)
5. Brett Cannon (32)
6. Donald Stufft (21)
7. Petr Viktorin (18)
8. Martin von Löwis (17)
9. Łukasz Langa (15)
10. Nathaniel J. Smith (15)
11. Steve Dower (15)
12. Raymond Hettinger (14)
13. Antoine Pitrou (13)
14. Mark Shannon (12)
15. Eric Snow (12)
16. Georg Brandl (11)
17. Tim Peters (10)
18. A.M. Kuchling (10)
19. Marc-André Lemburg (9)
20. Paul Moore (9)
21. Yury Selivanov (8)
22. Larry Hastings (8)
23. Christian Heimes (8)
24. Ivan Levkivskyi (8)
25. Pradyun Gedam (8)
26. Jeremy Hylton (7)
27. Thomas Wouters (7)
28. Moshe Zadka (7)
29. Benjamin Peterson (7)
30. Dustin Ingram (7)
31. Ee Durbin (7)
32. David Goodger (6)
33. Ka-Ping Yee (6)
34. Jim J. Jewett (6)
35. Phillip J. Eby (6)
36. Daniel Holth (6)
37. Chris Angelico (6)
38. Inada Naoki (6)
39. Pablo Galindo (6)
40. Brandt Bucher (6)
41. Pablo Galindo Salgado (6)
42. Tzu-ping Chung (6)
43. Jelle Zijlstra (6)
44. William Woodruff (6)
45. Collin Winter (6)
46. Anthony Baxter (5)
47. Neil Schemenauer (5)
48. Skip Montanaro (5)
49. Ethan Furman (5)
50. Talin (5)
51. Eric Traut (5)
52. Irit Katriel (5)
53. Paul Prescod (4)
54. Gregory Ewing (4)
55. Richard Jones (4)
56. Tarek Ziadé (4)
57. Carl Meyer (4)
58. Jukka Lehtosalo (4)
59. Thomas Kluyver (4)
60. Emma Harper Smith (4)
61. Jeroen Demeyer (4)
62. Mariatta (4)
63. Lysandros Nikolaou (4)
64. Ofek Lev (4)
65. Pradeep Kumar Srinivasan (4)
66. Travis Oliphant (3)
67. Michel Pelletier (3)
68. Alex Martelli (3)
69. Michael Hudson (3)
70. Neal Norwitz (3)
71. Steven Bethard (3)
72. Armin Ronacher (3)
73. Carol Willing (3)
74. Eli Bendersky (3)
75. Eric V. Smith (3)
76. Steven D'Aprano (3)
77. Jeffrey Yasskin (3)
78. Batuhan Taskaya (3)
79. Filipe Laíns (3)
80. Erlend Egeberg Aasland (3)
81. James Hilton-Balfe (3)
82. Zac Hatfield-Dodds (3)
83. Shantanu Jain (3)
84. Gregory P. Smith (3)
85. Hugo van Kemenade (3)
86. Ewa Jodlowska (3)
87. Aahz (2)
88. Oleg Broytman (2)
89. Fred L. Drake (2)
90. Jr. (2)
91. David Ascher (2)
92. Greg Wilson (2)
93. Gordon McMillan (2)
94. Christopher A. Craig (2)
95. Clark C. Evans (2)
96. Greg Stein (2)
97. Magnus Lie Hetland (2)
98. Jack Jansen (2)
99. Vinay Sajip (2)
100. Mark Hammond (2)
101. Josiah Carlson (2)
102. Terry Reedy (2)
103. Facundo Batista (2)
104. Ben Finney (2)
105. Calvin Spealman (2)
106. Tim Delaney (2)
107. Jesse Noller (2)
108. Stephen J. Turnbull (2)
109. Dirkjan Ochtman (2)
110. Miro Hrončok (2)
111. Cameron Simpson (2)
112. Alex Gaynor (2)
113. Ronald Oussoren (2)
114. Trishank Karthik Kuppusamy (2)
115. Vladimir Diaz (2)
116. Marina Moore (2)
117. Justin Cappos (2)
118. Stefano Borini (2)
119. Stefan Behnel (2)
120. Ned Deily (2)
121. Alexander Belopolsky (2)
122. Nick Humrich (2)
123. Mark E. Haase (2)
124. Robert Collins (2)
125. Koos Zevenhoven (2)
126. Cory Benfield (2)
127. Marcel Plch (2)
128. Mario Corchero (2)
129. Geoffrey Thomas (2)
130. Maggie Moss (2)
131. Stéphane Bidoul (2)
132. Mark Mendoza (2)
133. Shannon Zhu (2)
134. Paul Ganssle (2)
135. Daniel F Moisset (2)
136. Tobias Kohn (2)
137. David Foster (2)
138. Tal Einat (2)
139. Steven Troxler (2)
140. Erik De Bonte (2)
141. Sam Gross (2)
142. Ralf Gommers (2)
143. Sergey B Kirpichev (2)
144. Facundo Tuesca (2)
145. Savannah Ostrowski (2)
146. Hood Chatham (2)
147. Daniel Stutzbach (2)
148. Joe Carey (2)
149. Martijn Faassen (1)
150. The Python core team and community (1)
151. Paul Barrett (1)
152. Peter Schneider-Kamp (1)
153. Huaiyu Zhu (1)
154. Gregory Lielens (1)
155. Paul F. Dubois (1)
156. Sean Reifschneider (1)
157. Grant Griffin (1)
158. Jonathan Riehl (1)
159. Jason Petrone (1)
160. Frédéric B. Giacometti (1)
161. James C. Ahlstrom (1)
162. Jim Althoff (1)
163. Neil Hodgson (1)
164. Trent Mick (1)
165. David Eppstein (1)
166. Walter Dörwald (1)
167. Oren Tirosh (1)
168. Stepan Koltsov (1)
169. Scott Gilbert (1)
170. Thomas Heller (1)
171. Jeff Epler (1)
172. Just van Rossum (1)
173. Thomas Bellman (1)
174. Kevin Altis (1)
175. Dave Cole (1)
176. Andrew McNamara (1)
177. Cliff Wells (1)
178. Jack Diederich (1)
179. Peter Harris (1)
180. Roman Suzi (1)
181. Mike Meyer (1)
182. W Isaac Carroll (1)
183. Terence Way (1)
184. Steven Taschuk (1)
185. Kevin D. Smith (1)
186. Peter Astrand (1)
187. Samuele Pedroni (1)
188. Christian R. Reis (1)
189. Andrew McClelland (1)
190. Michael P. Dubner (1)
191. Micah Elliott (1)
192. Björn Lindqvist (1)
193. Jiwon Seo (1)
194. Ben North (1)
195. Lino Mastrodomenico (1)
196. Richard Oudkerk (1)
197. Alexandre Vassalotti (1)
198. Jervis Whitley (1)
199. Kerrick Staley (1)
200. Greg Slodkowicz (1)
201. Michael Foord (1)
202. Paul Colomiets (1)
203. Daniel Urban (1)
204. Benoit Bryon (1)
205. Lennart Regebro (1)
206. Todd Rovito (1)
207. Stefan Krah (1)
208. Holger Krekel (1)
209. Chris McDonough (1)
210. Joshua Landau (1)
211. Lukas Puehringer (1)
212. Joshua Lock (1)
213. Lois Anne DeLong (1)
214. Ben Hoyt (1)
215. Joseph Martinot-Lagarde (1)
216. Sebastian Kreft (1)
217. Charles-François Natali (1)
218. Christopher Barker (1)
219. Martin Teichmann (1)
220. Robert Kuska (1)
221. James Polley (1)
222. Ed Schofield (1)
223. Joseph Jevnik (1)
224. Mike G. Miller (1)
225. Robert T. McGibbon (1)
226. Serhiy Storchaka (1)
227. Dino Viehland (1)
228. Ryan Gonzalez (1)
229. Philip House (1)
230. Lisa Roach (1)
231. Tomáš Orsava (1)
232. Philipp Angerer (1)
233. Erik M. Bray (1)
234. Masayuki Yamamoto (1)
235. Markus Meskanen (1)
236. Julien Palard (1)
237. R David Murray (1)
238. Elvis Pranskevichus (1)
239. Eric N. Vander Weele (1)
240. Mark Williams (1)
241. Kushal Das (1)
242. Michael Lee (1)
243. Michael J. Sullivan (1)
244. Till Varoquaux (1)
245. Konstantin Kashin (1)
246. Ezio Melotti (1)
247. Berker Peksag (1)
248. Damien George (1)
249. Philippe PRADOS (1)
250. Sumana Harihareswara (1)
251. Chris Jerdonek (1)
252. Dennis Sweeney (1)
253. Sébastien Eustace (1)
254. Laurie Opperman (1)
255. Arun Babu Neelicattu (1)
256. Philippe Ombredanne (1)
257. C.A.M. Gerlach (1)
258. Karolina Surma (1)
259. Matthew Rahtz (1)
260. Vincent Siles (1)
261. Vikram Jayanthi (1)
262. Ammar Askar (1)
263. Bernát Gábor (1)
264. Laura Creighton (1)
265. Tian Gao (1)
266. Matthias Klose (1)
267. Stefano Rivera (1)
268. Elana Hashman (1)
269. Graham Bleaney (1)
270. Adam Turner (1)
271. Taneli Hukkinen (1)
272. John Belmonte (1)
273. Eddie Elizondo (1)
274. Germán Méndez Bravo (1)
275. Cooper Lees (1)
276. Franek Magiera (1)
277. Joshua Xu (1)
278. Ken Jin (1)
279. Marta Gómez Macías (1)
280. Alice Purcell (1)
281. Fridolín Pokorný (1)
282. Joshua Cannon (1)
283. Amethyst Reese (1)
284. Rich Chiodo (1)
285. Sebastián Ramírez (1)
286. Zixuan James Li (1)
287. Russell Keith-Magee (1)
288. Joanna Jablonski (1)
289. Domenico Andreoli (1)
290. Carl Friedrich Bolz-Tereick (1)
291. Simon Cross (1)
292. Tim Felgentreff (1)
293. David Hewitt (1)
294. Wenzel Jakob (1)
295. Marc-Andre Lemburg (1)
296. Donghee Na (1)
297. Karl Nelson (1)
298. Stepan Sindelar (1)
299. David Woods (1)
300. Stephen Rosen (1)
301. Joshua Bambrick (1)
302. Malcolm Smith (1)
303. Adrian Garcia Badaracco (1)
304. Joop van de Pol (1)
305. Jim Baker (1)
306. Paul Everitt (1)
307. Koudai Aono (1)
308. Dave Peck (1)
309. Jarek Potiuk (1)
310. Gregory R. Warnes (1)
311. Seth Michael Larson (1)
312. Emily Morehouse-Valcarcel (1)
313. Alexis Challande (1)
314. Victorien Plot (1)
315. Michael Sarahan (1)
316. Eneg (1)
317. Matt Wozniski (1)
318. Ivona Stojanovic (1)
319. Seth Larson (1)
320. Thomas Robitaille (1)
321. Jonathan Dekhtiar (1)
322. Deb Nicholson (1)
323. Stan Ulbrych (1)
324. Matt Page (1)
325. Klaus Zimmermann (1)
326. Peter Bierma (1)
327. Tony Lownds (1)
328. Andre Roberge (1)
329. Jason Orendorff (1)
330. Mike Verdone (1)
331. Carl Banks (1)
332. Patrick Maupin (1)
333. Lie Ryan (1)
334. Matt Chisholm (1)
335. Atsuo Ishimoto (1)
336. Gerald Britton (1)
337. Peter Moody (1)
338. Eric Pruitt (1)
339. Charles R. McCreary (1)
340. Reid Kleckner (1)
341. Brian Quinlan (1)
342. Laurens Van Houtven (1)
343. Zachary Ware (1)
344. Doug Hellmann (1)
345. The PEP Editors (1)

Planets My Code has Visited

2/8

• Mercury
• Venus
• Earth
• Mars
• Jupiter
• Saturn
• Uranus
• Neptune