fix: fixing import failure with setuptools>=82#141
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yanghan234 merged 2 commits intomainfrom Feb 25, 2026
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Fixes issue #140
Problem
mattersim fails to import when setuptools>=82 is installed because pkg_resources has been removed from setuptools. The error occurs in
__version__.py.Changes
__version__.py: Replacedpkg_resourceswithimportlib. Falls back to "unknown" if package metadata is not found (e.g. editable/dev installs).test_version.py(new): Added two test cases:mattersim.__version__is a non-empty stringpkg_resourcesis unavailable (reproduces the exact issue [Bug]: Mattersim 1.2.0 fails to import due to removed pkg_resources in SetupTools>=82 #140 scenario)