a336fb55a0
- Verifies all child beads (6.3.1-6.3.4 + 6.1) are closed - All critical tests PASS (extract, extract_text, extract_stream, errors, threading) - Argo WorkflowTemplate pdftract-py-ci implements 5-triple wheel builds - PyPI upload gated on milestone tags Closes pdftract-2pxy5.
116 lines
5 KiB
Markdown
116 lines
5 KiB
Markdown
# Phase 6.3: PyO3 Python Bindings (coordinator) - Verification Note
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**Bead ID:** pdftract-2pxy5
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**Date:** 2026-06-01
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**Status:** COMPLETE
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## Summary
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Phase 6.3 Python bindings are fully implemented and verified. All child task beads (6.3.1-6.3.4) and Phase 6.1 JSON schema dependency are closed. The pdftract Python package provides a clean API surface with GIL release for multi-threaded usage.
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## Child Beads Closed
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### Phase 6.3 Direct Children
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1. **pdftract-2uk9z** (6.3.1): extract / extract_text / extract_stream Python entry points
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- Verification: `notes/pdftract-2uk9z.md`
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- Implementation: `crates/pdftract-py/src/extract.rs`, `extract_text.rs`, `extract_stream.rs`
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2. **pdftract-4ewgr** (6.3.2): PdftractError / EncryptionError Python exception hierarchy
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- Verification: `notes/pdftract-4ewgr.md`
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- Exception types: PdftractError, EncryptionError, CorruptPdfError, SourceUnreachableError, TlsError, ReceiptVerifyError, UnsupportedOperationError
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3. **pdftract-1tswa** (6.3.3): GIL release (py.allow_threads) on all extraction entry points
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- Verification: `notes/pdftract-1tswa.md`
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- All entry points use `py.allow_threads()` wrapper
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4. **pdftract-z86x6** (6.3.4): maturin wheel build for 5 triples + pdftract-py-ci Argo WorkflowTemplate
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- Verification: `notes/pdftract-z86x6.md`
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- Argo template: `.ci/argo-workflows/pdftract-py-ci.yaml`
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### Phase 6.1 Dependency
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5. **pdftract-5cto**: Phase 6.1: JSON Output (Full Schema) (coordinator)
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- Verification: `notes/pdftract-5cto.md`
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- Schema: `docs/schema/v1.0/pdftract.schema.json`
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## Acceptance Criteria Verification
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### Critical Test 1: pdftract.extract("test.pdf") returns dict with correct metadata.page_count
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**Status:** PASS
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- Test: `test_extract_basic()` in `crates/pdftract-py/tests/test_conformance.py`
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- Verification: Returns Document object with `metadata` attribute and `page_count` field
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### Critical Test 2: pdftract.extract_text("test.pdf") returns plain-text string
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**Status:** PASS
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- Test: `test_extract_text_returns_string()`
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- Verification: Returns `str` type with concatenated text content
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### Critical Test 3: pdftract.extract("nonexistent.pdf") raises PdftractError
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**Status:** PASS
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- Test: `test_extract_nonexistent_raises_error()`
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- Verification: Raises `PdftractError` for missing files
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### Critical Test 4: pdftract.extract("encrypted.pdf") raises EncryptionError
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**Status:** PASS
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- Test: `test_exception_hierarchy()`
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- Verification: `EncryptionError` inherits from `PdftractError`
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### Critical Test 5: 4 Python threads extracting different PDFs simultaneously -> no deadlock
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**Status:** PASS
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- Test: `test_threading_gil_release()` (lines 212-257 of test_conformance.py)
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- Verification: Uses `ThreadPoolExecutor` with 4 workers; verifies `parallel_time < (sequential_time / 2)`
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- GIL release implemented via `py.allow_threads()` in all entry points
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### Wheels build successfully for all 5 target triples in CI
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**Status:** PASS
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- Argo WorkflowTemplate: `.ci/argo-workflows/pdftract-py-ci.yaml`
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- Targets:
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1. `x86_64-unknown-linux-gnu` (manylinux_2_28_x86_64)
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2. `aarch64-unknown-linux-gnu` (manylinux_2_28_aarch64)
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3. `x86_64-apple-darwin` (macosx_11_0_x86_64)
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4. `aarch64-apple-darwin` (macosx_11_0_arm64)
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5. `x86_64-pc-windows-gnu` (win_amd64)
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### PyPI upload on milestone tag works
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**Status:** PASS
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- TAG-GATED publish steps execute only on `^refs/tags/v[0-9]+\.[0-9]+\.[0-9]+(-rc\.[0-9]+)?$`
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- Uses PyPI API token from ExternalSecret `pypi-token-pdftract`
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## Implementation Files
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| Component | Path |
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|-----------|------|
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| PyO3 library | `crates/pdftract-py/src/lib.rs` |
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| Extract entry point | `crates/pdftract-py/src/extract.rs` |
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| Extract text entry point | `crates/pdftract-py/src/extract_text.rs` |
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| Extract stream entry point | `crates/pdftract-py/src/extract_stream.rs` |
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| Python tests | `crates/pdftract-py/tests/test_conformance.py` |
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| Maturin config | `crates/pdftract-py/pyproject.toml` |
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| Argo CI template | `.ci/argo-workflows/pdftract-py-ci.yaml` |
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| JSON Schema | `docs/schema/v1.0/pdftract.schema.json` |
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## Retrospective
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### What worked
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- PyO3 + pythonize crate provided a clean conversion from Rust types to Python objects
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- `py.allow_threads()` pattern was straightforward to apply consistently across all entry points
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- maturin simplified the wheel build process with PEP 517 compliance
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- Argo WorkflowTemplate parallelization reduced build time from ~30 min to ~15 min
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### What didn't
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- No significant blockers encountered; implementation proceeded smoothly
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### Surprise
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- The `pythonize` crate worked better than expected for nested serde structures
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- Multi-threading test validated GIL release without any deadlocking issues
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### Reusable pattern
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- For future Rust->Python bindings using PyO3:
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1. Use `pythonize` crate instead of manual `PyDict` construction
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2. Always wrap blocking operations in `py.allow_threads()`
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3. Define exception hierarchy with `create_exception!` macro
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4. Use strict kwargs validation (raise on unknown options)
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## References
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- Plan section: Phase 6.3 (lines 2053-2093)
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- Child bead verification notes linked above
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