Tag
All Nuvika Blog posts tagged “Python”.
Engineering
When bcrypt 4.0 removed __about__.__version__, passlib's CryptContext started failing our password hashing at runtime. Why we deleted the abstraction and called bcrypt directly.
Engineering
Heavy module-level SDK imports (boto3, numpy, azure, google.cloud) blew past Cloud Run's 60-second cold-start budget and got our Celery worker SIGTERM'd. The lazy-import fix — and the test patches it broke.
Engineering
Two bugs, one villain — assuming order and shape don't matter. FastAPI matching /rules/{id} before /rules/available, and a frontend helper that already unwrapped the response envelope.
Engineering
One line — sys.modules['boto3'] = MagicMock() — at module level poisoned 3,000 tests across the whole pytest session. Why order-dependent failures are haunted, not flaky.
Engineering
A query that worked on PostgreSQL detonated on SQLite with 'str' object has no attribute 'hex'. Why the strict test database did us a favor, and converting types at the boundary.
Fastapi
Why Fintropy chose FastAPI over Django for its 84-endpoint backend, and the honest cost of that decision a year and a half in.