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.

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

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

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
__future__
__main__	gvanrossum, ncoghlan
_thread
_testbuffer
abc
aifc	bitdancer
argparse
array
ast	benjaminp, pablogsal, isidentical
asyncio	1st1, asvetlov, gvanrossum, graingert, kumaraditya303, willingc
atexit
audioop	serhiy-storchaka
base64
bdb
binascii
bisect	rhettinger*
builtins
bz2
calendar
cgi	ethanfurman*
cgitb	ethanfurman*
chunk
cmath	mdickinson
cmd
code
codecs	malemburg, doerwalter
codeop
collections	rhettinger*
collections.abc	rhettinger*, stutzbach^
colorsys
compileall	carljm
concurrent.futures	pitrou, brianquinlan, gpshead*
configparser	ambv*
contextlib	ncoghlan, 1st1
contextvars
copy	avassalotti
copyreg	avassalotti
cProfile
crypt	jafo^*
csv	smontanaro (inactive)
ctypes	theller (inactive), abalkin, amauryfa, meadori
curses	Yhg1s
dataclasses	ericvsmith*, carljm
datetime	abalkin, pganssle
dbm
decimal	facundobatista, rhettinger, mdickinson
difflib	tim-one (inactive)
dis	1st1
doctest	tim-one (inactive)
email	warsaw, bitdancer*, maxking
encodings	malemburg
ensurepip	ncoghlan, dstufft, pradyunsg, pfmoore
enum	eliben*, warsaw, ethanfurman*
errno	Yhg1s
faulthandler	vstinner, gpshead
fcntl	Yhg1s
filecmp
fileinput
fnmatch
fractions	mdickinson
ftplib	giampaolo*
functools	rhettinger*
gc	pitrou, pablogsal
getopt
getpass
gettext
glob
grp
gzip
hashlib	tiran, gpshead*
heapq	rhettinger*, stutzbach^
hmac	tiran, gpshead*
html	ezio-melotti*
http
idlelib	kbkaiser (inactive), terryjreedy*, serwy (inactive), taleinat
imaplib
imghdr
importlib	brettcannon
inspect	1st1
io	benjaminp, stutzbach^
ipaddress	pmoody^
itertools	rhettinger*
json	etrepum (inactive), ezio-melotti, rhettinger
keyword
lib2to3	benjaminp
libmpdec
linecache
locale	malemburg
logging	vsajip
lzma
mailbox
mailcap
marshal
math	mdickinson, rhettinger, stutzbach^
mimetypes
mmap	Yhg1s
modulefinder	theller (inactive), jvr^
msilib
msvcrt
multiprocessing	applio*, pitrou, jnoller^ (inactive), sbt^ (inactive), gpshead*
netrc
nis
nntplib
numbers
operator
optparse	mitsuhiko
os
os.path	serhiy-storchaka
ossaudiodev
parser	pablogsal
pathlib	barneygale*
pdb
pickle	avassalotti
pickletools	avassalotti
pipes
pkgutil
platform	malemburg
plistlib
poplib
posix	larryhastings, gpshead
pprint	freddrake
profile
pstats
pty	Yhg1s*
pwd
py_compile	carljm
pyclbr	isidentical
pydoc	AA-Turner
queue	rhettinger*
quopri
random	rhettinger, mdickinson
re	ezio-melotti, serhiy-storchaka
readline	Yhg1s
reprlib
resource	Yhg1s
rlcompleter
runpy	ncoghlan
sched
secrets
select
selectors	neologix^, giampaolo
shelve
shlex
shutil	tarekziade, giampaolo
signal	gpshead
site
smtplib
sndhdr
socket	gpshead
socketserver
spwd
sqlite3	ghaering^, erlend-aasland*
ssl	jackjansen, tiran, dstufft, alex
stat	tiran
statistics	stevendaprano, rhettinger
string
stringprep
struct	mdickinson, meadori
subprocess	astrand^ (inactive), giampaolo, gpshead*
sunau
symtable	benjaminp
sys
sysconfig	FFY00
syslog	jafo^*
tabnanny	tim-one (inactive)
tarfile	gustaebel
telnetlib
tempfile
termios	Yhg1s
test	ezio-melotti
textwrap
threading	pitrou, gpshead
time	abalkin, pganssle
timeit
tkinter	gpolo^, serhiy-storchaka
token
tokenize	meadori
tomllib	hauntsaninja*
trace	abalkin
traceback	iritkatriel
tracemalloc	vstinner
tty	Yhg1s*
turtle	gregorlingl^, willingc
types	1st1
typing	gvanrossum, JelleZijlstra*, AlexWaygood*, carljm, sobolevn*
unicodedata	malemburg, ezio-melotti
unittest	voidspace*, ezio-melotti, rbtcollins, gpshead
unittest.mock	voidspace*
urllib	orsenthil
uu
uuid
venv	vsajip
warnings
wave
weakref	freddrake
webbrowser
winreg	stutzbach^
winsound
wsgiref	pjenvey
xdrlib
xml.dom
xml.dom.minidom
xml.dom.pulldom
xml.etree	eliben*, scoder
xml.parsers.expat
xml.sax
xml.sax.handler
xml.sax.saxutils
xml.sax.xmlreader
xmlrpc
zipapp	pfmoore
zipfile	alanmcintyre^, serhiy-storchaka, Yhg1s, gpshead
zipimport	Yhg1s*
zlib	Yhg1s, gpshead*

Tools

Tool	Maintainers
Argument Clinic	larryhastings, AlexWaygood*, erlend-aasland
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	David.Edelsohn^
Cygwin	jlt63^, stutzbach^
Emscripten	hoodmane, pmp-p, rdb, rth, ryanking13
FreeBSD
HP-UX
Linux
macOS	ronaldoussoren, ned-deily
NetBSD1
OS2/EMX	aimacintyre^
Solaris/OpenIndiana	jcea
Windows	tjguk, zware, zooba, pfmoore
JVM/Java	frank.wierzbicki^

Miscellaneous

Interest Area	Maintainers
algorithms	rhettinger*
argument clinic	larryhastings, AlexWaygood*, erlend-aasland
ast/compiler	benjaminp, 1st1, pablogsal, markshannon, isidentical, brandtbucher, carljm, iritkatriel
autoconf/makefiles	Yhg1s*
bsd
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
coverity scan	tiran, Yhg1s
cryptography	gpshead, dstufft
data formats	mdickinson
database	malemburg
devguide	merwok, ezio-melotti, willingc, Mariatta, hugovk, AA-Turner
documentation	ezio-melotti, merwok, JulienPalard, willingc, hugovk, AA-Turner, AlexWaygood*
emoji	Mariatta
extension modules	encukou, ncoghlan
filesystem	giampaolo
frozen modules	ericsnowcurrently, gvanrossum, kumaraditya303
f-strings	ericvsmith*
GUI
i18n	malemburg, merwok
import machinery	brettcannon, ncoghlan, ericsnowcurrently
io	benjaminp, stutzbach^, gpshead
JIT	brandtbucher*
locale	malemburg
mathematics	mdickinson, malemburg, stutzbach^, rhettinger
memory management	tim-one, malemburg, Yhg1s
memoryview
networking	giampaolo, gpshead
object model	benjaminp, Yhg1s
packaging	tarekziade, malemburg, alexis^, merwok, dstufft, pfmoore
pattern matching	brandtbucher*
peg parser	gvanrossum, pablogsal, lysnikolaou
performance	vstinner, serhiy-storchaka, 1st1, rhettinger, markshannon, brandtbucher, carljm, Fidget-Spinner, AlexWaygood*
pip	ncoghlan, dstufft, pfmoore, Marcus.Smith^, pradyunsg
py3 transition	benjaminp
release management	tarekziade, malemburg, benjaminp, warsaw, gvanrossum, anthonybaxter^, merwok, ned-deily, birkenfeld, JulienPalard
runtime lifecycle	ericsnowcurrently, kumaraditya303, zooba
str.format	ericvsmith*
subinterpreters	ericsnowcurrently, kumaraditya303
testing	voidspace, ezio-melotti
test coverage
threads	gpshead
time and dates	malemburg, abalkin, pganssle
unicode	malemburg, ezio-melotti, benjaminp
version control	merwok, ezio-melotti

Documentation translations

For a list of translators, see this table about translations.