Scope all hubconf.py imports for torch.hub.list()

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Streamlined dependency checks in hubconf.py for YOLOv5 models.

📊 Key Changes

• Removed the global import of Path from pathlib.
• Moved check_requirements and set_logging imports inside the _create function.
• Restructured the code to check requirements only within the _create function.

🎯 Purpose & Impact

• 🧹 Cleaner Code Organization: Importing modules only where they're needed makes the code less cluttered.
• ⏱ Performance Improvement: May slightly improve the load time of the module by avoiding checking for requirements until necessary.
• 🛠 User Experience: Users can potentially see a more streamlined interaction when loading models, with more focused error messages if there are missing requirements.

[glenn-jocher]

Output confirmed looks good.

torch.hub.list('ultralytics/yolov5', force_reload=True)

Downloading: "https://github.com/ultralytics/yolov5/archive/master.zip" to /Users/glennjocher/.cache/torch/hub/master.zip

['custom',
 'yolov5l',
 'yolov5l6',
 'yolov5m',
 'yolov5m6',
 'yolov5s',
 'yolov5s6',
 'yolov5x',
 'yolov5x6']