Make the registry self-tests report the backends they promise

[egeboy35]

Both registry modules carry a header advertising a command to check the install:

#   python -m DeepDataMiningLearning.ngdet.detectors.base
# Expected: prints the registered detector backends (after importing adapters).

Run it and you get an empty list. Same for ngperception/depth/estimators/base.py.

$ python -m DeepDataMiningLearning.ngdet.detectors.base
Registered detector backends: []

$ python -m DeepDataMiningLearning.ngperception.depth.estimators.base
Registered depth backends: []

Why

Under python -m pkg.mod the file executes as __main__. The from . import <adapters> inside the block then imports the adapters, which do from .base import register, ... — loading this module a second time under its real name. @register populates that copy's registry; __main__ prints its own, still empty. CPython says as much:

RuntimeWarning: 'DeepDataMiningLearning.ngdet.detectors.base' found in sys.modules
after import of package 'DeepDataMiningLearning.ngdet.detectors', but prior to
execution of '...base'; this may result in unpredictable behaviour

The registry itself is fine — this is a reporting bug, not a functional one. A normal import sees one module object and registration works: importing hf_detr takes DETECTOR_REGISTRY from [] to ['hf_detr']. Only the self-test lies.

The change

Each if __name__ == "__main__": block now reads the canonical module instead of its own globals:

ngdet.detectors.base          [] -> ['hf_detr', 'yolo', 'locate_anything']
depth.estimators.base         [] -> ['hf_depth']

Nothing outside those two blocks changes.

One thing I checked because I got it wrong first

My first attempt rewrote the Registered: {list(...)} text inside build_detector / build_estimator by accident, which would have turned a helpful KeyError into a NameError for anyone asking for an unknown backend. The diff here touches only the __main__ blocks, and I verified both builders still raise KeyError naming the registered backends:

KeyError: "Unknown detector backend 'nosuchbackend'. Registered: ['hf_detr', 'yolo', 'locate_anything']"
KeyError: "Unknown depth backend 'nosuch'. Registered: ['hf_depth']"

🤖 Generated with Claude Code