nq.pisa

Description

A PISA index for the NQ (Natural Questions) dataset

Usage

# Load the artifact
import pyterrier as pt
index = pt.Artifact.from_hf('pyterrier/nq.pisa')
index = pt.bm25() # returns a BM25 retriever

Benchmarks

name	nDCG@10	R@1000
bm25	0.3071	0.8977
dph	0.2988	0.8947

Reproduction

import pyterrier as pt
from tqdm import tqdm
import ir_datasets
from pyterrier_pisa import PisaIndex
index = PisaIndex("nq.pisa", threads=16)
dataset = ir_datasets.load('beir/nq')
docs = ({'docno': d.doc_id, 'text': d.default_text()} for d in tqdm(dataset.docs))
index.index(docs)

Metadata

{
  "type": "sparse_index",
  "format": "pisa",
  "package_hint": "pyterrier-pisa",
  "stemmer": "porter2"
}