retrievalx 0.1.1

The complete BM25 engine for Python: production-scale, Rust-native

retrievalx

The complete BM25 engine for Python: all major BM25 variants, production-scale internals, Rust-native performance.

Highlights

• Rust core + PyO3 bindings, distributed as wheels.
• BM25 variants: Okapi, Plus, L, Adpt, F, T, Atire, Tf-Idf.
• Retrieval strategies: Exhaustive DAAT/TAAT, WAND, Block-Max WAND, MaxScore.
• Incremental updates with tombstones + explicit compaction.
• Persistence with binary snapshots, metadata sidecar, WAL replay, and mmap loading.
• Fusion utilities: RRF, linear combination, score normalization.
• Built-in BEIR benchmark, recall degradation report, and scoring variant comparison runner.

Quickstart

from retrievalx import BM25Index

index = BM25Index.from_documents([
    "rust and python",
    "information retrieval with bm25",
])

print(index.search("rust retrieval", top_k=5))

Real-world Examples

• examples/it_ticket_search.py
• examples/legal_clause_discovery.py
• examples/ecommerce_query_tuning.py
• examples/security_log_hunt.py
• examples/wal_crash_recovery.py
• examples/multilingual_news_monitor.py
• examples/production_hybrid_reranking.py
• examples/benchmark_retrievalx_vs_rank_bm25.py

Build

./scripts/check_all.sh

Project Policies

• Contributing guide: CONTRIBUTING.md
• Security policy: SECURITY.md
• Support policy: SUPPORT.md
• Governance model: GOVERNANCE.md
• Release process: RELEASING.md

License

Apache-2.0