Experts index

This document has tables that list Python Modules, Tools, Platforms and Interest Areas and GitHub names for each item that indicate a maintainer or an expert in the field. This list is intended to be used by issue submitters, issue triage people, and other issue participants to find people to @mention or add as reviewers to issues and pull requests. People on this list may be asked to render final judgment on a feature or bug. If no active maintainer is listed for a given module, then questionable changes should be discussed on the Core Development Discourse category, while any other issues can and should be decided by any committer.

Developers can choose to follow labels, so if a label that they are following is added to an issue or pull request, they will be notified automatically. The .github/CODEOWNERS file is also used to indicate maintainers that will be automatically added as reviewers to pull requests.

Names followed by a ‘*’ may be assigned issues involving the module or topic. Unless a name is followed by a ‘*’, you should never assign an issue to that person.

The Platform and Interest Area tables list broader fields in which various people have expertise. These people can also be contacted for help, opinions, and decisions when issues involve their areas.

If a listed maintainer does not respond to requests for comment for an extended period (three weeks or more), they should be marked as inactive in this list by placing the word ‘inactive’ in parenthesis behind their tracker id. They are of course free to remove that inactive mark at any time.

Committers should update these tables as their areas of expertise widen. New topics may be added to the Interest Area table at will.

The existence of this list is not meant to indicate that these people must be contacted for decisions; it is, rather, a resource to be used by non-committers to find responsible parties, and by committers who do not feel qualified to make a decision in a particular context.

Stdlib

Module	Maintainers
__main__	gvanrossum, ncoghlan
annotationlib	JelleZijlstra*
argparse	savannahostrowski*, serhiy-storchaka*
ast	benjaminp, pablogsal, isidentical, JelleZijlstra, eclips4
asyncio	1st1, asvetlov, gvanrossum, graingert, kumaraditya303, willingc
bisect	rhettinger*
codecs	malemburg
collections	rhettinger*
collections.abc	rhettinger*
compileall	carljm
compression.zlib	Yhg1s, gpshead*, emmatyping
compression.zstd	emmatyping*
concurrent.futures	pitrou, gpshead*
configparser	ambv*
contextlib	ncoghlan, 1st1
copy	serhiy-storchaka*
copyreg	serhiy-storchaka*
csv	serhiy-storchaka*
curses	Yhg1s
dataclasses	ericvsmith*, carljm
datetime	pganssle, StanFromIreland
decimal	facundobatista, rhettinger
dis	1st1
email	warsaw, bitdancer*
encodings	malemburg
ensurepip	ncoghlan, dstufft, pradyunsg, pfmoore
enum	warsaw, ethanfurman*
errno	Yhg1s
faulthandler	vstinner, gpshead, ZeroIntensity*
fcntl	Yhg1s
fnmatch	serhiy-storchaka*
ftplib	giampaolo*
functools	rhettinger*
gc	pitrou, pablogsal, nascheme
getopt	serhiy-storchaka*
getpath	FFY00*
gettext	tomasr8
glob	serhiy-storchaka*
hashlib	tiran, gpshead*, picnixz
heapq	rhettinger*
hmac	tiran, gpshead*, picnixz
html	ezio-melotti*
idlelib	terryjreedy*, taleinat
importlib	brettcannon, FFY00*
inspect	1st1
io	benjaminp
itertools	rhettinger*
json	ezio-melotti, rhettinger, serhiy-storchaka*
locale	malemburg
logging	vsajip
math	rhettinger
mmap	Yhg1s
modulefinder	FFY00
multiprocessing	pitrou, gpshead*
optparse	serhiy-storchaka*
os.path	serhiy-storchaka*
parser	pablogsal
pathlib	barneygale*
pdb	gaogaotiantian
pickle	serhiy-storchaka*
pickletools	serhiy-storchaka*
pkgutil	FFY00*
platform	malemburg
posix	larryhastings, gpshead
pty	Yhg1s*
py_compile	carljm
pyclbr	isidentical
pydoc	AA-Turner, serhiy-storchaka*
queue	rhettinger*
random	rhettinger
re	ezio-melotti, serhiy-storchaka*
readline	Yhg1s
resource	Yhg1s
runpy	ncoghlan, FFY00
selectors	giampaolo
shutil	giampaolo
signal	gpshead
site	FFY00*
socket	gpshead
sqlite3	erlend-aasland*
ssl	tiran, dstufft, alex
stat	tiran
statistics	rhettinger
subprocess	giampaolo, gpshead*
symtable	benjaminp
sysconfig	FFY00*
tempfile	serhiy-storchaka*
termios	Yhg1s
test	ezio-melotti, serhiy-storchaka*
threading	pitrou, gpshead
time	pganssle, StanFromIreland
tkinter	serhiy-storchaka*
tomllib	hauntsaninja*
traceback	iritkatriel
tracemalloc	vstinner
tty	Yhg1s*
turtle	willingc
turtledemo	terryjreedy*
types	1st1
typing	gvanrossum, JelleZijlstra*, AlexWaygood*, carljm, sobolevn*
unicodedata	malemburg, ezio-melotti
unittest	ezio-melotti, gpshead, serhiy-storchaka*
urllib	orsenthil
venv	vsajip, FFY00*
weakref	nascheme
xml.etree	scoder
zipapp	pfmoore
zipfile	serhiy-storchaka, Yhg1s, gpshead
zipimport	Yhg1s*
zoneinfo	pganssle, StanFromIreland

Tools

Tool	Maintainers
Argument Clinic	larryhastings, AlexWaygood*, erlend-aasland, serhiy-storchaka*
Deepfreeze	gvanrossum, kumaraditya303
PEG Generator	gvanrossum, pablogsal, lysnikolaou

Platforms

For official contacts for supported platforms, see PEP 11.

Platforms listed here are not necessarily supported by CPython. Some of the experts listed here maintain and distribute Python for “their” platform as a third-party project.

Platform	Maintainers
AIX	ayappanec
Android	mhsmith
Emscripten	hoodmane, pmp-p, rdb, rth, ryanking13
iOS	freakboy3742, ned-deily
macOS	ronaldoussoren, ned-deily, freakboy3742
Solaris/OpenIndiana	jcea, kulikjak
Windows	tjguk, zooba, pfmoore

Miscellaneous

Interest area	Maintainers
algorithms	rhettinger*, serhiy-storchaka
argument clinic	larryhastings, AlexWaygood*, erlend-aasland, serhiy-storchaka*
AST/compiler	benjaminp, 1st1, pablogsal, markshannon, isidentical, brandtbucher, carljm, iritkatriel
autoconf/makefiles	Yhg1s*, emmatyping
issue tracker	ezio-melotti
buildbots	zware, pablogsal
bytecode	benjaminp, 1st1, markshannon, brandtbucher, carljm, iritkatriel
context managers	ncoghlan
core workflow	Mariatta, ezio-melotti, hugovk, AA-Turner
cryptography	gpshead, dstufft, picnixz
database	malemburg
devguide	merwok, ezio-melotti, willingc, Mariatta, hugovk, AA-Turner, StanFromIreland
documentation	ezio-melotti, merwok, JulienPalard, willingc, hugovk, AA-Turner, AlexWaygood*, StanFromIreland
emoji	Mariatta
extension modules	encukou, ncoghlan, FFY00
frozen modules	ericsnowcurrently, gvanrossum, kumaraditya303, FFY00
f-strings	ericvsmith*
i18n	malemburg, merwok, tomasr8, StanFromIreland
import machinery	brettcannon, ncoghlan, ericsnowcurrently, FFY00*
initialization	FFY00*
io	benjaminp, gpshead
JIT	brandtbucher*, savannahostrowski*
locale	malemburg
mathematics	malemburg, rhettinger, serhiy-storchaka
memory management	tim-one, malemburg, Yhg1s, nascheme
networking	gpshead
object model	benjaminp, Yhg1s
packaging	malemburg, merwok, dstufft, pfmoore, emmatyping, FFY00
pattern matching	brandtbucher*
PEG parser	gvanrossum, pablogsal, lysnikolaou
performance	vstinner, serhiy-storchaka*, 1st1, rhettinger, markshannon, brandtbucher, carljm, Fidget-Spinner, AlexWaygood*, nascheme
pip	ncoghlan, dstufft, pfmoore, pradyunsg
release management	malemburg, benjaminp, warsaw, gvanrossum, merwok, ned-deily, JulienPalard, hugovk
runtime lifecycle	ericsnowcurrently, kumaraditya303, zooba, ZeroIntensity, nascheme, FFY00
str.format	ericvsmith*
subinterpreters	ericsnowcurrently, kumaraditya303, ZeroIntensity*
symbol table	JelleZijlstra, carljm
testing	ezio-melotti
threads	gpshead
time and dates	malemburg, pganssle, StanFromIreland
Unicode	malemburg, ezio-melotti, benjaminp
version control	merwok, ezio-melotti

Experts emeritus

Names followed by a ‘^’ indicate old bugs.python.org usernames, for people that did not transition to GitHub.

Stdlib

Module	Expert
codecs	doerwalter
collections.abc	stutzbach^
concurrent.futures	brianquinlan
copy	avassalotti
copyreg	avassalotti
csv	smontanaro
ctypes	theller, abalkin, amauryfa, meadori
datetime	abalkin
difflib	tim-one
doctest	tim-one
email	maxking
enum	eliben
heapq	stutzbach
idlelib	kbkaiser, serwy
io	stutzbach^
ipaddress	pmoody^
json	etrepum
math	stutzbach^
modulefinder	theller, jvr^
multiprocessing	applio, jnoller^, sbt^
optparse	mitsuhiko
pickle	avassalotti
pickletools	avassalotti
pprint	freddrake
selectors	neologix^
shutil	tarekziade
sqlite3	ghaering^
ssl	jackjansen
statistics	stevendaprano
struct	meadori
subprocess	astrand^
syslog	jafo^
tabnanny	tim-one
tarfile	gustaebel
time	abalkin
tkinter	gpolo^
tokenize	meadori
trace	abalkin
turtle	gregorlingl^
unittest	rbtcollins
weakref	freddrake
winreg	stutzbach^
wsgiref	pjenvey
xml.etree	eliben
zipfile	alanmcintyre^

Platforms

Platform	Expert
AIX	edelsohn
Cygwin	jlt63^, stutzbach^
JVM/Java	frank.wierzbicki^
OS2/EMX	aimacintyre^

Miscellaneous

Interest Area	Expert
filesystem	giampaolo
io	stutzbach^
mathematics	stutzbach^
networking	giampaolo
packaging	tarekziade, alexis^
pip	Marcus.Smith^
release management	tarekziade, anthonybaxter^, birkenfeld
time and dates	abalkin

Documentation translations

Translations are within the charter of Editorial Board. For a list of translations and their coordinators, see this table of translations.