Python: Show all subclasses of a class đź”—
class.__subclasses__() returns a list of the direct subclasses of a given class: In [1]: class Base: pass ...: class Alpha(Base): pass In [2]: Bas [...]
Adam Johnson
Posts
Django: Introducing django-harlequin, a launcher for Terminal-based SQL IDE Harlequin đź”—
Harlequin is a Terminal-based SQL IDE by Ted Conbeer. It is pretty popular, with over 2,500 GitHub Stars and counting. It looks like this: Harlequin i [...]
Django: An admin extension to prevent state leaking between requests đź”—
Here’s a small protection I added to a project a few years ago. I was considering it again since I saw a similar potential bug in a Django middleware. [...]
Python: Diffing unit tests to keep a copy-pasted code in sync đź”—
Copy-paste-tweaking library code feels like a dirty but inevitable programming practice. Often driven by deadlines or other constraints, it seems all [...]
Python: Make line number paths with inspect đź”—
Many terminals and text editors support what I’ll call “line number paths” of the form <filename>:<lineno>. Opening that path, whether by clicking or [...]
Django: Pinpoint upstream changes with Git đź”—
Django’s release notes are extensive and describe nearly all changes. Still, when upgrading between Django versions, you may encounter behaviour chang [...]
Git: Show the first tag containing a commit SHA đź”—
Say you have a commit SHA and want to know the first version it was released in. You can use this command: $ git describe --contains <sha> | sed -E 's [...]
Boost Your Git DX update out now đź”—
I have just released an update to my book Boost Your Git DX, six months after its initial release. This update adds some extra content and has a bunch [...]
Django: Write-up on optimizing the system check framework đź”—
Django’s system check framework provides fantastic protection for configuration mishaps. It’s like a targeted linter that runs when you start Django c [...]
Django: Fuss-free use of Homebrew GDAL/GEOS libraries on macOS đź”—
GeoDjango requires the GDAL and GEOS spatial libraries. On macOS, you can use Homebrew to install these, but they won’t be picked up by default since [...]