fix: handle missing parent modules in _has_module#49035
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Catch ModuleNotFoundError from importlib.util.find_spec() when a parent optional dependency package is absent, so optional feature probes return False instead of crashing. Add regression coverage for the missing-parent-package case and mark the pure import_utils test module to skip unrelated global accelerator cleanup. Co-authored-by: GitHub Copilot <175728472+github-copilot[bot]@users.noreply.github.com> Signed-off-by: shuhao zhang <shuhao_zhang@hust.edu.cn> (cherry picked from commit 737fe13)
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Problem
importlib.util.find_spec()can raiseModuleNotFoundErrorfor a dotted optional dependency when its parent package is absent._has_module()should report that dependency as unavailable instead of failing the caller.Fix
Catch
ModuleNotFoundErroronly around the specification lookup and returnFalse. Keep the existing warning behavior for exceptions raised while importing a module whose spec exists.Validation
ruff check vllm/utils/import_utils.py tests/utils_/test_import_utils.pyruff format --check vllm/utils/import_utils.py tests/utils_/test_import_utils.pypython3 -m compileall -q vllm/utils/import_utils.py tests/utils_/test_import_utils.pyThis is an optional-dependency correctness fix and makes no performance claim.