Fix Diffusers export dtype resolution - #2225
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Included review availability: Your plan provides up to 12 included reviews per hour; 10 remain after this review. 📝 WalkthroughWalkthroughThe export dtype resolver now handles models without ChangesExport dtype fallback
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: 🔵 Low · up to The export dtype resolution change is localized and preserves configured-dtype mismatch warnings, but the regression suite does not yet exercise the exact FrozenDict-without-torch_dtype case. The PR is mergeable with explicit follow-up to add that targeted test. Suggested reviewers: 🚥 Pre-merge checks | ✅ 5 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (5 passed)
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #2225 +/- ##
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- Coverage 78.99% 78.41% -0.59%
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Files 522 522
Lines 60599 60603 +4
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- Hits 47872 47521 -351
- Misses 12727 13082 +355
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Signed-off-by: realAsma <akuriparambi@nvidia.com>
Signed-off-by: realAsma <akuriparambi@nvidia.com>
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Inline comments:
In `@tests/unit/torch/export/test_unified_export_hf.py`:
- Around line 36-43: Add focused offline pytest coverage for
_resolve_export_dtype covering configured and unconfigured model dtypes,
including a FrozenDict configuration fixture and the mismatch-warning path.
Reuse local fixtures, assert the resolved dtype for matching and absent
configuration values, and verify that an explicitly requested dtype differing
from the configured dtype emits the expected warning.
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modelopt/torch/export/unified_export_hf.pytests/unit/torch/export/test_unified_export_hf.py
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Inline comments:
In `@tests/unit/torch/export/test_unified_export_hf.py`:
- Around line 40-44: Add a parameterized test case using an empty FrozenDict()
without torch_dtype, with no requested dtype, expecting torch.float32 and the
existing default status value.
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tests/unit/torch/export/test_unified_export_hf.py
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Inline comments:
In `@tests/unit/torch/export/test_unified_export_hf.py`:
- Around line 63-64: Add a brief comment immediately before the
pytest.importorskip call in
test_resolve_export_dtype_with_empty_diffusers_config explaining that Diffusers
is imported locally to keep it optional during torch-only unit-test collection.
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tests/unit/torch/export/test_unified_export_hf.py
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Signed-off-by: realAsma <akuriparambi@nvidia.com>
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What does this PR do?
Type of change: Bug fix
When an explicit export dtype is provided, tolerate model configs that do not define
torch_dtype. This fixes Diffusers export under dependency combinations where the pipeline config is aFrozenDictwithout that field, while preserving existing mismatch warnings when a configured dtype is available.Usage
N/A — no API change.
Testing
pytest_pwd tests/unit/torch/export/test_unified_export_hf.py -k resolve_export_dtype(1 passed)pytest_pwd tests/unit/torch/export/test_unified_export_hf.py(23 passed)pre-commit run --files modelopt/torch/export/unified_export_hf.py tests/unit/torch/export/test_unified_export_hf.pyBefore your PR is "Ready for review"
Make sure you read and follow Contributor guidelines and your commits are signed (
git commit -s -S).Make sure you read and follow the Security Best Practices.
CONTRIBUTING.md: N/AAdditional Information
This is independent of PR #2223 and addresses the unrelated minimum-Transformers Diffusers export failure.
Summary by CodeRabbit
Bug Fixes
Tests