En kodare

Hi, my name is Anders. I’m a prolific coder and the author of:

mutmut - the premier mutation testing tool for python
iommi, with Johan Lübcke - build webapps in Django faster, and better
instar - powerful advanced transformations of Clojure data structures
hammett - the fastest test runner for python, and pytest compatible!
…and many many more

Currently working at TriOptima, where we stabilize the global financial system.

Blog archive

2020-10-23 - 100% coverage, of documentation!
2020-09-14 - Transparent APIs
2020-09-07 - Django silent failures
2020-08-01 - Transparent sync
2020-07-26 - Naming things
2020-07-03 - Who's fault are defects then?
2020-07-02 - Introducing iommi on YouTube
2020-05-19 - Python is slow - it doesn't have to be
2020-05-14 - Introducing iommi, part 2
2020-05-13 - Introducing iommi
2020-03-02 - Test ordering
2019-11-20 - A nice testing environment
2019-10-18 - Unit tests are nice... but WHICH unit?
2019-10-17 - When DRY fails
2019-06-21 - Good Workflows 🏈
2019-06-21 - The Else Statement Smell
2019-06-21 - Measure WTFs/m before taking a job
2019-04-23 - Flaky tests, part 4
2019-04-10 - Mutation vs Property Based testing
2019-04-09 - Talk: Mutation Testing – Theory and Practice
2019-01-16 - A quick performance comparison of Python parsers
2019-01-13 - A quick performance comparison of Python code formatters
2018-11-18 - The missing mutant — a performance bug we missed
2018-09-12 - Flaky tests part 3: freeze the world
2018-08-28 - Intermittent tests: aligned primary keys
2018-06-25 - Salvaging abandoned projects
2018-06-25 - RefinableObject — Object Orientation Refined
2018-06-09 - "Even if they're right, they're wrong"
2018-02-09 - Moving a large and old codebase to Python3
2018-02-05 - Use the biggest hammer!
2017-10-24 - Vastly faster Python integration tests
2017-10-17 - Elm first impressions from prod
2017-08-14 - Overanalyzing kids shows: Bing
2017-08-03 - Code generation is terrible and great
2017-07-07 - OCaml — first impressions
2017-07-07 - A case for a short form for argument labels
2017-05-17 - Django comefrom considered harmful
2017-05-09 - Keyword argument confusion in Python
2017-05-02 - Sam Harris [was] wrong about encryption
2017-05-01 - When you assume, Gruber edition
2017-02-07 - What I want in Python
2016-12-22 - Python is still my first choice, but…
2016-12-21 - Suggestions for a better Python 2->3 story
2016-12-21 - Followup to "My Disillusionment with Clojure and Lisps"
2016-12-14 - My disillusionment with Clojure and Lisps
2016-12-12 - Mutation testing in practice
2016-12-01 - Mutmut: a Python mutation testing system
2016-11-07 - A small dive into, and rejection of, Elm