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

abc

argparse

array

ast

benjaminp, pablogsal, isidentical, JelleZijlstra

asyncio

1st1, asvetlov, gvanrossum, graingert, kumaraditya303, willingc

atexit

base64

bdb

binascii

bisect

rhettinger*

builtins

bz2

calendar

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

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

libmpdec

linecache

locale

malemburg

logging

vsajip

lzma

mailbox

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

gaogaotiantian

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*

symtable

benjaminp

sys

sysconfig

FFY00

syslog

jafo^*

tabnanny

tim-one (inactive)

tarfile

gustaebel

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^

Android

mhsmith

Cygwin

jlt63^, stutzbach^

Emscripten

hoodmane, pmp-p, rdb, rth, ryanking13

FreeBSD

HP-UX

iOS

freakboy3742, ned-deily

Linux

macOS

ronaldoussoren, ned-deily, freakboy3742

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

symbol table

JelleZijlstra, carljm

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.