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 Dryft, where we are making the construction business better for customers and workers.

Blog archive

2021-04-04 - Safe number parsing
2021-04-04 - Django, React, and CORS
2021-01-20 - So you want to load a file?
2020-11-17 - Why we don't use python native enums
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