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Krzysztof kuhy Rudnicki 74fb46b4ab PSD: zero findings, and four modules that no longer run on import
152 ruff findings to 0 across twelve files, and mypy --strict is clean on all
of them but one -- see the end.

The course is marked unrunnable because it wants Kafka and Flink, so the
verification is what can be run without them. Ten of the twelve modules now
import cleanly against a venv with confluent-kafka, kafka-python and flask; the
two pyflink ones are skipped. That check did not exist before, because four of
these files WERE their own side effect:

- `kafka/generate_and_send.py` and `kafka/kafka_consumer.py` ran their
  `while True:` loop at module level. Importing either never returns; I gave up
  after twelve seconds of rdkafka connection failures.
- `zin1/producent.py` built a KafkaProducer at module level and raised
  NoBrokersAvailable on import.
- `flink/anomaly_detector.py` called `env.execute()` at module level.

Each is a `main()` behind a `__main__` guard now, so importing one is free and
running it is unchanged.

`webinterface.py` called `json.loads` and never imported json, so the first
message on the topic would have raised NameError. mypy then found three more
of the same shape: confluent-kafka's `msg.error()` and `msg.value()` both
return Optional, and the code dereferenced them straight away. They are
narrowed to locals now, which also stops `msg.error()` being called twice per
message. A malformed alarm with no timestamp is skipped with a warning instead
of dividing None by 1000.

Two SLF001 findings were reads of `KafkaError._PARTITION_EOF`. That leading
underscore is confluent-kafka's own naming and there is no public alias, but
`KafkaError.name()` is public and returns exactly that string -- checked
against the installed library, where code() is -191 and name() is
"_PARTITION_EOF". Flask's `debug=True` is now opt-in via FLASK_DEBUG, because
the debug console executes arbitrary code.

The ten `random` calls are simulation, not crypto, so S311 is not a real
vulnerability -- but `secrets.SystemRandom()` is a drop-in with the same
methods and no rule to argue with, so that is what they use.

Behaviour is checked, not assumed: the sensor still returns a location in
1..10 and a temperature in -20..40, the thresholds still classify -15 as too
cold, 40 as too hot and 20 as normal, transactions still carry a four-digit
card id, and TemperatureReading survives a to_dict/from_dict round trip.

**Two mypy errors remain and are deliberate.** `--strict` implies
`disallow_subclassing_any`, and the Flink job must subclass pyflink's
MapFunction and KeyedProcessFunction, which ship no types. Fixing it means
weakening strict globally or writing an override for our own module. Neither is
worth it, so the two are reported in TODO-refactor-remaining.md rather than
hidden.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-29 08:22:57 +02:00
.github/workflows Gate the invariants, fix ECOTE's unrunnable tests, contain build output 2026-08-28 18:43:13 +02:00
.vscode Merge branch 'main' of https://github.com/kuhyx/WUT_Computer_Science 2025-04-21 17:21:13 +02:00
gates Hold the coursework to the same lint bar as the tooling 2026-08-28 19:53:04 +02:00
NotProgramming EARIN: zero findings, verified against byte-identical program output 2026-08-28 20:39:53 +02:00
Programming PSD: zero findings, and four modules that no longer run on import 2026-08-29 08:22:57 +02:00
scripts A run may no longer change the tree it ran in 2026-08-29 07:59:15 +02:00
.binary-allowlist Gate the invariants, fix ECOTE's unrunnable tests, contain build output 2026-08-28 18:43:13 +02:00
.gitignore Run all 33 safe courses; fix what that broke 2026-08-28 18:52:31 +02:00
.pre-commit-config.yaml Gate the invariants, fix ECOTE's unrunnable tests, contain build output 2026-08-28 18:43:13 +02:00
CLAUDE.md ECOTE and ECRYPT_PROJECT: zero findings, tests still green 2026-08-28 20:03:01 +02:00
DOCS-runnability.md Hold the coursework to the same lint bar as the tooling 2026-08-28 19:53:04 +02:00
install.sh Add CI, install.sh and the run.sh harness 2026-08-28 18:26:10 +02:00
pyproject.toml PSD: zero findings, and four modules that no longer run on import 2026-08-29 08:22:57 +02:00
README.md Revise README to reflect group project inclusion 2026-02-06 22:23:55 +01:00
run.sh Hold the coursework to the same lint bar as the tooling 2026-08-28 19:53:04 +02:00
TODO-file-length-250.md Declare vendored subtrees and park the data-txt cap decision 2026-08-28 17:31:30 +02:00
TODO-refactor-remaining.md PSD: zero findings, and four modules that no longer run on import 2026-08-29 08:22:57 +02:00

WUT_Computer_Science

This repository aims to consolidate every single project I did solo during my Computer Science course on Warsaw University of Technology
It does not include projects I did in groups like:
EARIN
EDABA
ECRYPT
EOPSY

Thanks to some git magic this repo now CONTAINS all the group projects alongside with all proper contributors