Łukasz Langa
CPython Developer In Residence
Greater Poland Voivodeship
Summary
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Rockstar
Top expert inComprehensive Python Ecosystem DevelopmentPython Ecosystem Development and Data Science
Łukasz Langa is a CPython Developer in Residence and Python core developer with 16 years of experience, best known as the creator of Black, the opinionated Python code formatter. He served as release manager for Python 3.8 and 3.9, is a long-time maintainer (configparser) and author or co-author of multiple PEPs that have shaped Python’s typing and release processes. His open-source work spans deep interpreter improvements—fixing unittest/MagicMock bugs, reducing reference leaks and hardening the test suite—to developer tooling and typing ecosystems like mypy, typeshed and flake8-bugbear. Łukasz has also modernized backend systems (EdgeDB/GEL) by improving type hints and profiling and brought py3k compatibility to projects like Radicale. Based in Greater Poland, he blends systems-level rigor with a passion for developer experience, and off-hours he’s a hobbyist musician and dad.
16 years of coding experience
11 years of employment as a software developer
Polish, English, German
Stackoverflow
31reputation
4kreached
2answers
0questions
Github Skills (74)
documentations10
postgresql10
python10
typeinference10
compiler-development10
testing10
carddav10
linter10
django210
type-check10
django10
stubs10
internationalization10
formatter10
implicit-typing10
Programming languages (25)
Github contributions (5)
psf/black
Mar 2018 - Dec 2021
The uncompromising Python code formatter
Role in this project:
Back-end Developer
Back-end DeveloperContributions:24 reviews, 372 commits, 239 PRs in 3 years 9 months
Contributions summary:Łukasz contributed to the `psf/black` project, which is a Python code formatter. Their work primarily involved incorporating and managing the `Grammar.txt` file used for formatting Python code. They also fixed code formatting issues related to spacing in relative imports, parenthesized set expressions, unary expressions, and default arguments, improving the overall readability and consistency of the formatted code. They also enhanced the formatting related to features in Python 3.6+.
python-codepre-commit-hookpythongofmtcodeformatter
python/devguide
Mar 2012 - Nov 2022
The Python developer's guide
Role in this project:Technical Writer / Release Manager
Technical Writer / Release ManagerContributions:16 reviews, 10 commits, 51 PRs in 10 years 9 months
Contributions summary:Łukasz's contributions primarily revolve around maintaining and updating the Python developer's guide. They updated the documentation to reflect changes in Python versions, including end-of-life dates and release information. The user also contributed to documenting processes like auto-merging and core developer nomination, and also fixed various ReST formatting issues.
python-developerpython
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