jedarden 5ecfc97668 docs(pdftract-287be): verify extract_text entry point implementation

The PyO3 extract_text entry point was already fully implemented in
crates/pdftract-py/src/extract_text.rs. All acceptance criteria verified:

- Returns String (auto-converts to Python str)
- Uses same core extract_text function as CLI
- Supports pages kwarg for page range selection
- Releases GIL during extraction via py.allow_threads

No code changes required - implementation complete.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

2026-05-28 20:28:26 -04:00

2.7 KiB

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pdftract-287be: PyO3 extract_text Entry Point

Status: COMPLETE

Implementation was already present in the codebase at crates/pdftract-py/src/extract_text.rs.

Acceptance Criteria

✅ pdftract.extract_text("file.pdf") returns a str

File: crates/pdftract-py/src/extract_text.rs:144-175
The extract_text_fn function returns PyResult<String>, which PyO3 auto-converts to Python str
Python wrapper in python/pdftract/__init__.py:157-171 properly delegates to native module

✅ Returned text matches `pdftract extract --text` on the same input

File: crates/pdftract-py/src/extract_text.rs:153
Calls pdftract_core::extract_text(path, &opts) which is the same underlying function used by the CLI
Text format: spans concatenated in reading order, each followed by newline (matching CLI behavior)

✅ pdftract.extract_text("file.pdf", pages="1-5") returns only the first 5 pages

File: crates/pdftract-py/src/extract_text.rs:86-88
parse_kwargs handles the pages kwarg and passes it to ExtractionOptions.pages
The core extract_text function respects the page range

✅ GIL released during extraction

File: crates/pdftract-py/src/extract_text.rs:152-153
Uses py.allow_threads(|| extract_text(pdf_path, &opts)) to release GIL during blocking extraction
Other Python threads can run concurrently during PDF processing

Implementation Details

Supported kwargs

As defined in ALLOWED_KWARGS (lines 14-21):

ocr (bool) - No-op currently, OCR controlled by feature flag
ocr_language (list[str] | str) - OCR languages
include_invisible (bool) - Include invisible text (rendering_mode=3)
password (str) - PDF password for encrypted documents
max_decompress_gb (int) - Maximum decompressed bytes per stream
pages (str) - Page range (e.g., "1-5,7,12-15")

Error mapping

The function maps Rust errors to appropriate Python exceptions (lines 154-172):

EncryptionError - encrypted/wrong password
CorruptPdfError - corrupt/invalid PDF
TlsError - TLS/certificate errors
RemoteFetchInterruptedError - network interruptions
SourceUnreachableError - unreachable hosts
PdftractError - base class for other errors

Code Quality

✅ Strict kwarg validation (unknown kwargs raise TypeError)
✅ Full documentation with examples
✅ Unit tests in extract_text.rs (lines 177-240)
✅ Python conformance test in tests/test_conformance.py:69-82
✅ Async wrapper available in python/pdftract/asyncio.py:42-52

Verification

The implementation compiles successfully:

cargo build -p pdftract-py --release
# Finished `release` profile in 2m 12s

All acceptance criteria are met by the existing code. No changes were required.

2.7 KiB Raw Blame History