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Add support for resources in namespace packages - #196
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Signed-off-by: Filipe Laíns <lains@archlinux.org>
That is changing, we want to add support for resources in namespace packages. Signed-off-by: Filipe Laíns <lains@archlinux.org>
Signed-off-by: Filipe Laíns <lains@archlinux.org>
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This was referenced Jan 31, 2022
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Aug 21, 2025
Fix Python 3.9 compatibility issue with importlib.resources Fixes TypeError: expected str, bytes or os.PathLike object, not NoneType when importing mex.model in Python 3.9 due to namespace package issues with importlib.resources.files(). ### Changes - Added importlib_resources fallback for Python < 3.10 compatibility - Added error handling with pkgutil fallback for namespace packages - Updated dependencies to include importlib-resources>=1.3 for Python < 3.10 ### Technical Details The issue occurred because spec.origin is None for namespace packages in Python 3.9, causing pathlib.Path() to fail. The fix: 1. Uses importlib_resources backport which has proper namespace package support 2. Provides fallback using pkgutil.iter_modules() when primary approach fails ### Files Changed - mex/model/__init__.py - Added fallback logic and refactored resource loading - pyproject.toml - Added conditional dependency on importlib-resources ### References - [Add support for resources in namespace packages](python/importlib_resources#196) - importlib_resources backport library - Python 3.9's built-in `importlib.resources` lacks namespace package support, requiring the backport library for compatibility
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Fixes #68