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import argparse |
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import json |
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import os |
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import time |
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import numpy as np |
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import nltk |
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from rank_bm25 import BM25Okapi |
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def combine_all_sentences(knowledge_file): |
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sentences, urls = [], [] |
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with open(knowledge_file, "r", encoding="utf-8") as json_file: |
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for i, line in enumerate(json_file): |
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data = json.loads(line) |
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sentences.extend(data["url2text"]) |
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urls.extend([data["url"] for i in range(len(data["url2text"]))]) |
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return sentences, urls, i + 1 |
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def retrieve_top_k_sentences(query, document, urls, top_k): |
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tokenized_docs = [nltk.word_tokenize(doc) for doc in document] |
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bm25 = BM25Okapi(tokenized_docs) |
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scores = bm25.get_scores(nltk.word_tokenize(query)) |
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top_k_idx = np.argsort(scores)[::-1][:top_k] |
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return [document[i] for i in top_k_idx], [urls[i] for i in top_k_idx] |
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if __name__ == "__main__": |
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parser = argparse.ArgumentParser( |
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description="Get top 100 sentences with BM25 in the knowledge store." |
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) |
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parser.add_argument( |
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"-k", |
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"--knowledge_store_dir", |
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type=str, |
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default="data_store/output_dev", |
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help="The path of the knowledge_store_dir containing json files with all the retrieved sentences.", |
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) |
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parser.add_argument( |
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"-c", |
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"--claim_file", |
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type=str, |
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default="data/dev.json", |
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help="The path of the file that stores the claim.", |
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) |
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parser.add_argument( |
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"-o", |
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"--json_output", |
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type=str, |
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default="data_store/dev_top_k.json", |
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help="The output dir for JSON files to save the top 100 sentences for each claim.", |
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) |
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parser.add_argument( |
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"--top_k", |
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default=100, |
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type=int, |
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help="How many documents should we pick out with BM25.", |
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) |
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parser.add_argument( |
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"-s", |
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"--start", |
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type=int, |
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default=0, |
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help="Staring index of the files to process.", |
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) |
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parser.add_argument( |
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"-e", "--end", type=int, default=-1, help="End index of the files to process." |
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) |
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args = parser.parse_args() |
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with open(args.claim_file, "r", encoding="utf-8") as json_file: |
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target_examples = json.load(json_file) |
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if args.end == -1: |
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args.end = len(os.listdir(args.knowledge_store_dir)) |
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print(args.end) |
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files_to_process = list(range(args.start, args.end)) |
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total = len(files_to_process) |
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with open(args.json_output, "w", encoding="utf-8") as output_json: |
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done = 0 |
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for idx, example in enumerate(target_examples): |
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if idx in files_to_process: |
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print(f"Processing claim {idx}... Progress: {done + 1} / {total}") |
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document_in_sentences, sentence_urls, num_urls_this_claim = ( |
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combine_all_sentences( |
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os.path.join(args.knowledge_store_dir, f"{idx}.json") |
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) |
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) |
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print( |
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f"Obtained {len(document_in_sentences)} sentences from {num_urls_this_claim} urls." |
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) |
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st = time.time() |
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top_k_sentences, top_k_urls = retrieve_top_k_sentences( |
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example["claim"], document_in_sentences, sentence_urls, args.top_k |
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) |
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print(f"Top {args.top_k} retrieved. Time elapsed: {time.time() - st}.") |
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json_data = { |
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"claim_id": idx, |
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"claim": example["claim"], |
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f"top_{args.top_k}": [ |
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{"sentence": sent, "url": url} |
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for sent, url in zip(top_k_sentences, top_k_urls) |
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], |
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} |
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output_json.write(json.dumps(json_data, ensure_ascii=False) + "\n") |
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done += 1 |
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output_file.flush() |
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