Skip to main content

A plugin for flake8 finding likely bugs and design problems in your program. Contains warnings that don't belong in pyflakes and pep8.

Project description

A plugin for flake8 finding likely bugs and design problems in your program. Contains warnings that don’t belong in pyflakes and pep8:

bug·bear  (bŭg′bâr′)
1. A cause of fear, anxiety, or irritation: *Overcrowding is often
   a bugbear for train commuters.*
2. A difficult or persistent problem: *"One of the major bugbears of
   traditional AI is the difficulty of programming computers to
   recognize that different but similar objects are instances of the
   same type of thing" (Jack Copeland).*
3. A fearsome imaginary creature, especially one evoked to frighten

List of warnings


Do not use bare except:, it also catches unexpected events like memory errors, interrupts, system exit, and so on. Prefer except Exception:. If you’re sure what you’re doing, be explicit and write except BaseException:.


Just run:

python test

OMG, this is Python 3 only!

Relax, you can run flake8 with all popular plugins as a tool perfectly fine under Python 3.5+ even if you want to analyze Python 2 code. This way you’ll be able to parse all of the new syntax supported on Python 3 but also effectively all the Python 2 syntax at the same time.

If you’re still invested in Python 2, there might be a small subset of deprecated syntax that you’d have to abandon… but you’re already doing that, right? six or python-future bridge the gaps.

By making the code exclusively Python 3.5+, I’m able to focus on the quality of the checks and re-use all the nice features of the new releases (check out pathlib) instead of wasting cycles on Unicode compatiblity, etc.



Change Log


  • packaging herp derp


  • bugfix: include tests in the source package (to make test work for everyone)

  • bugfix: explicitly open README.rst in UTF-8 in for systems with other default encodings


  • first published version

  • date-versioned


Glued together by Łukasz Langa.

Project details

Release history Release notifications | RSS feed

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

flake8-bugbear-16.4.2.tar.gz (4.7 kB view hashes)

Uploaded Source

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page