rerankers


Namererankers JSON
Version 0.2.0 PyPI version JSON
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home_pageNone
SummaryA unified API for various document re-ranking models.
upload_time2024-04-12 15:35:55
maintainerNone
docs_urlNone
authorNone
requires_python>=3.8
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# rerankers

![Python Versions](https://img.shields.io/badge/Python-3.8_3.9_3.10_3.11-blue)
[![Downloads](https://static.pepy.tech/badge/rerankers/month)](https://pepy.tech/project/rerankers)
[![Twitter Follow](https://img.shields.io/twitter/follow/bclavie?style=social)](https://twitter.com/bclavie)


_A lightweight unified API for various reranking models. Developed by [@bclavie](https://twitter.com/bclavie) as a member of [answer.ai](https://www.answer.ai)_

---

Welcome to `rerankers`! Our goal is to provide users with a simple API to use any reranking models.

## Updates

- v0.1.2: πŸ†• Voyage reranking API
- v0.1.1: Langchain integration fixed!
- v0.1.0: Initial release

## Why `rerankers`?

Rerankers are an important part of any retrieval architecture, but they're also often more obscure than other parts of the pipeline.

Sometimes, it can be hard to even know which one to use. Every problem is different, and the best model for use X is not necessarily the same one as for use Y.

Moreover, new reranking methods keep popping up: for example, RankGPT, using LLMs to rerank documents, appeared just last year, with very promising zero-shot benchmark results.

All the different reranking approaches tend to be done in their own library, with varying levels of documentation. This results in an even higher barrier to entry. New users are required to swap between multiple unfamiliar input/output formats, all with their own quirks!

`rerankers` seeks to address this problem by providing a simple API for all popular rerankers, no matter the architecture.

`rerankers` aims to be:
- πŸͺΆ Lightweight. It ships with only the bare necessities as dependencies.
- πŸ“– Easy-to-understand. There's just a handful of calls to learn, and you can then use the full range of provided reranking models.
- πŸ”— Easy-to-integrate. It should fit in just about any existing pipelines, with only a few lines of code!
- πŸ’ͺ Easy-to-expand. Any new reranking models can be added with very little knowledge of the codebase. All you need is a new class with a `rank()` function call mapping a (query, [documents]) input to a `RankedResults` output.
- πŸ› Easy-to-debug. This is a beta release and there might be issues, but the codebase is conceived in such a way that most issues should be easy to track and fix ASAP.

## Get Started

Installation is very simple. The core package ships with just two dependencies, `tqdm` and `pydantic`, so as to avoid any conflict with your current environment.
You may then install only the dependencies required by the models you want to try out:

```sh
# Core package only, will require other dependencies already installed
pip install rerankers

# All transformers-based approaches (cross-encoders, t5, colbert)
pip install "rerankers[transformers]"

# RankGPT
pip install "rerankers[gpt]"

# API-based rerankers (Cohere, Jina, soon MixedBread)
pip install "rerankers[api]"

# All of the above
pip install "rerankers[all]"
```

## Usage

Load any supported reranker in a single line, regardless of the architecture:
```python
from rerankers import Reranker

# Cross-encoder default. You can specify a 'lang' parameter to load a multilingual version!
ranker = Reranker('cross-encoder')

# Specific cross-encoder
ranker = Reranker('mixedbread-ai/mxbai-rerank-xlarge-v1', model_type='cross-encoder')

# Default T5 Seq2Seq reranker
ranker = Reranker("t5")

# Specific T5 Seq2Seq reranker
ranker = Reranker("unicamp-dl/InRanker-base", model_type = "t5")

# API (Cohere)
ranker = Reranker("cohere", lang='en' (or 'other'), api_key = API_KEY)

# Custom Cohere model? No problem!
ranker = Reranker("my_model_name", api_provider = "cohere", api_key = API_KEY)

# API (Jina)
ranker = Reranker("jina", api_key = API_KEY)

# RankGPT4-turbo
ranker = Reranker("rankgpt", api_key = API_KEY)

# RankGPT3-turbo
ranker = Reranker("rankgpt3", api_key = API_KEY)

# RankGPT with another LLM provider
ranker = Reranker("MY_LLM_NAME" (check litellm docs), model_type = "rankgpt", api_key = API_KEY)

# ColBERTv2 reranker
ranker = Reranker("colbert")

# ... Or a non-default colbert model:
ranker = Reranker(model_name_or_path, model_type = "colbert")

```

_Rerankers will always try to infer the model you're trying to use based on its name, but it's always safer to pass a `model_type` argument to it if you can!_

Then, regardless of which reranker is loaded, use the loaded model to rank a query against documents:

```python
> results = ranker.rank(query="I love you", docs=["I hate you", "I really like you"], doc_ids=[0,1])
> results
RankedResults(results=[Result(doc_id=1, text='I really like you', score=0.26170814, rank=1), Result(doc_id=0, text='I hate you', score=0.079210326, rank=2)], query='I love you', has_scores=True)
```

You don't need to pass `doc_ids`! If not provided, they'll be auto-generated as integers corresponding to the index of a document in `docs`.

All rerankers will return a `RankedResults` object, which is a pydantic object containing a list of `Result` objects and some other useful information, such as the original query. You can retrieve the top `k` results from it by running `top_k()`:

```python
> results.top_k(1)
[Result(doc_id=1, text='I really like you', score=0.26170814, rank=1)]
```

And that's all you need to know to get started quickly! Check out the overview notebook for more information on the API and the different models, or the langchain example to see how to integrate this in your langchain pipeline.


## Features

Legend:
- βœ… Supported
- 🟠 Implemented, but not fully fledged
- πŸ“ Not supported but intended to be in the future
- ⭐ Same as above, but **important**.
- ❌ Not supported & not currently planned

Models:
- βœ… Any standard SentenceTransformer or Transformers cross-encoder
- 🟠 RankGPT (Implemented using original repo, but missing the rankllm's repo improvements)
- βœ… T5-based pointwise rankers (InRanker, MonoT5...)
- βœ… Cohere API rerankers
- βœ… Jina API rerankers
- 🟠 ColBERT-based reranker - not a model initially designed for reranking, but quite strong (Implementation could be optimised and is from a third-party implementation.)
- πŸ“ MixedBread API (Reranking API not yet released)
- πŸ“β­ RankLLM/RankZephyr (Proper RankLLM implementation will replace the RankGPT one, and introduce RankZephyr support)
- πŸ“ LiT5

Features:
- βœ… Reranking 
- βœ… Consistency notebooks to ensure performance on `scifact` matches the litterature for any given model implementation (Except RankGPT, where results are harder to reproduce).
- πŸ“ Training on Python >=3.10 (via interfacing with other libraries)
- πŸ“ ONNX runtime support --> Unlikely to be immediate
- ❌(πŸ“Maybe?) Training via rerankers directly

            

Raw data

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    "maintainer_email": "Ben Clavi\u00e9 <bc@answer.ai>",
    "keywords": "reranking, retrieval, rag, nlp",
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    "author_email": "Ben Clavi\u00e9 <bc@answer.ai>",
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    "description": "\n# rerankers\n\n![Python Versions](https://img.shields.io/badge/Python-3.8_3.9_3.10_3.11-blue)\n[![Downloads](https://static.pepy.tech/badge/rerankers/month)](https://pepy.tech/project/rerankers)\n[![Twitter Follow](https://img.shields.io/twitter/follow/bclavie?style=social)](https://twitter.com/bclavie)\n\n\n_A lightweight unified API for various reranking models. Developed by [@bclavie](https://twitter.com/bclavie) as a member of [answer.ai](https://www.answer.ai)_\n\n---\n\nWelcome to `rerankers`! Our goal is to provide users with a simple API to use any reranking models.\n\n## Updates\n\n- v0.1.2: \ud83c\udd95 Voyage reranking API\n- v0.1.1: Langchain integration fixed!\n- v0.1.0: Initial release\n\n## Why `rerankers`?\n\nRerankers are an important part of any retrieval architecture, but they're also often more obscure than other parts of the pipeline.\n\nSometimes, it can be hard to even know which one to use. Every problem is different, and the best model for use X is not necessarily the same one as for use Y.\n\nMoreover, new reranking methods keep popping up: for example, RankGPT, using LLMs to rerank documents, appeared just last year, with very promising zero-shot benchmark results.\n\nAll the different reranking approaches tend to be done in their own library, with varying levels of documentation. This results in an even higher barrier to entry. New users are required to swap between multiple unfamiliar input/output formats, all with their own quirks!\n\n`rerankers` seeks to address this problem by providing a simple API for all popular rerankers, no matter the architecture.\n\n`rerankers` aims to be:\n- \ud83e\udeb6 Lightweight. It ships with only the bare necessities as dependencies.\n- \ud83d\udcd6 Easy-to-understand. There's just a handful of calls to learn, and you can then use the full range of provided reranking models.\n- \ud83d\udd17 Easy-to-integrate. It should fit in just about any existing pipelines, with only a few lines of code!\n- \ud83d\udcaa Easy-to-expand. Any new reranking models can be added with very little knowledge of the codebase. All you need is a new class with a `rank()` function call mapping a (query, [documents]) input to a `RankedResults` output.\n- \ud83d\udc1b Easy-to-debug. This is a beta release and there might be issues, but the codebase is conceived in such a way that most issues should be easy to track and fix ASAP.\n\n## Get Started\n\nInstallation is very simple. The core package ships with just two dependencies, `tqdm` and `pydantic`, so as to avoid any conflict with your current environment.\nYou may then install only the dependencies required by the models you want to try out:\n\n```sh\n# Core package only, will require other dependencies already installed\npip install rerankers\n\n# All transformers-based approaches (cross-encoders, t5, colbert)\npip install \"rerankers[transformers]\"\n\n# RankGPT\npip install \"rerankers[gpt]\"\n\n# API-based rerankers (Cohere, Jina, soon MixedBread)\npip install \"rerankers[api]\"\n\n# All of the above\npip install \"rerankers[all]\"\n```\n\n## Usage\n\nLoad any supported reranker in a single line, regardless of the architecture:\n```python\nfrom rerankers import Reranker\n\n# Cross-encoder default. You can specify a 'lang' parameter to load a multilingual version!\nranker = Reranker('cross-encoder')\n\n# Specific cross-encoder\nranker = Reranker('mixedbread-ai/mxbai-rerank-xlarge-v1', model_type='cross-encoder')\n\n# Default T5 Seq2Seq reranker\nranker = Reranker(\"t5\")\n\n# Specific T5 Seq2Seq reranker\nranker = Reranker(\"unicamp-dl/InRanker-base\", model_type = \"t5\")\n\n# API (Cohere)\nranker = Reranker(\"cohere\", lang='en' (or 'other'), api_key = API_KEY)\n\n# Custom Cohere model? No problem!\nranker = Reranker(\"my_model_name\", api_provider = \"cohere\", api_key = API_KEY)\n\n# API (Jina)\nranker = Reranker(\"jina\", api_key = API_KEY)\n\n# RankGPT4-turbo\nranker = Reranker(\"rankgpt\", api_key = API_KEY)\n\n# RankGPT3-turbo\nranker = Reranker(\"rankgpt3\", api_key = API_KEY)\n\n# RankGPT with another LLM provider\nranker = Reranker(\"MY_LLM_NAME\" (check litellm docs), model_type = \"rankgpt\", api_key = API_KEY)\n\n# ColBERTv2 reranker\nranker = Reranker(\"colbert\")\n\n# ... Or a non-default colbert model:\nranker = Reranker(model_name_or_path, model_type = \"colbert\")\n\n```\n\n_Rerankers will always try to infer the model you're trying to use based on its name, but it's always safer to pass a `model_type` argument to it if you can!_\n\nThen, regardless of which reranker is loaded, use the loaded model to rank a query against documents:\n\n```python\n> results = ranker.rank(query=\"I love you\", docs=[\"I hate you\", \"I really like you\"], doc_ids=[0,1])\n> results\nRankedResults(results=[Result(doc_id=1, text='I really like you', score=0.26170814, rank=1), Result(doc_id=0, text='I hate you', score=0.079210326, rank=2)], query='I love you', has_scores=True)\n```\n\nYou don't need to pass `doc_ids`! If not provided, they'll be auto-generated as integers corresponding to the index of a document in `docs`.\n\nAll rerankers will return a `RankedResults` object, which is a pydantic object containing a list of `Result` objects and some other useful information, such as the original query. You can retrieve the top `k` results from it by running `top_k()`:\n\n```python\n> results.top_k(1)\n[Result(doc_id=1, text='I really like you', score=0.26170814, rank=1)]\n```\n\nAnd that's all you need to know to get started quickly! Check out the overview notebook for more information on the API and the different models, or the langchain example to see how to integrate this in your langchain pipeline.\n\n\n## Features\n\nLegend:\n- \u2705 Supported\n- \ud83d\udfe0 Implemented, but not fully fledged\n- \ud83d\udccd Not supported but intended to be in the future\n- \u2b50 Same as above, but **important**.\n- \u274c Not supported & not currently planned\n\nModels:\n- \u2705 Any standard SentenceTransformer or Transformers cross-encoder\n- \ud83d\udfe0 RankGPT (Implemented using original repo, but missing the rankllm's repo improvements)\n- \u2705 T5-based pointwise rankers (InRanker, MonoT5...)\n- \u2705 Cohere API rerankers\n- \u2705 Jina API rerankers\n- \ud83d\udfe0 ColBERT-based reranker - not a model initially designed for reranking, but quite strong (Implementation could be optimised and is from a third-party implementation.)\n- \ud83d\udccd MixedBread API (Reranking API not yet released)\n- \ud83d\udccd\u2b50 RankLLM/RankZephyr (Proper RankLLM implementation will replace the RankGPT one, and introduce RankZephyr support)\n- \ud83d\udccd LiT5\n\nFeatures:\n- \u2705 Reranking \n- \u2705 Consistency notebooks to ensure performance on `scifact` matches the litterature for any given model implementation (Except RankGPT, where results are harder to reproduce).\n- \ud83d\udccd Training on Python >=3.10 (via interfacing with other libraries)\n- \ud83d\udccd ONNX runtime support --> Unlikely to be immediate\n- \u274c(\ud83d\udccdMaybe?) Training via rerankers directly\n",
    "bugtrack_url": null,
    "license": "Apache License Version 2.0, January 2004 http://www.apache.org/licenses/  TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION  1. Definitions.  \"License\" shall mean the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document.  \"Licensor\" shall mean the copyright owner or entity authorized by the copyright owner that is granting the License.  \"Legal Entity\" shall mean the union of the acting entity and all other entities that control, are controlled by, or are under common control with that entity. For the purposes of this definition, \"control\" means (i) the power, direct or indirect, to cause the direction or management of such entity, whether by contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the outstanding shares, or (iii) beneficial ownership of such entity.  \"You\" (or \"Your\") shall mean an individual or Legal Entity exercising permissions granted by this License.  \"Source\" form shall mean the preferred form for making modifications, including but not limited to software source code, documentation source, and configuration files.  \"Object\" form shall mean any form resulting from mechanical transformation or translation of a Source form, including but not limited to compiled object code, generated documentation, and conversions to other media types.  \"Work\" shall mean the work of authorship, whether in Source or Object form, made available under the License, as indicated by a copyright notice that is included in or attached to the work (an example is provided in the Appendix below).  \"Derivative Works\" shall mean any work, whether in Source or Object form, that is based on (or derived from) the Work and for which the editorial revisions, annotations, elaborations, or other modifications represent, as a whole, an original work of authorship. For the purposes of this License, Derivative Works shall not include works that remain separable from, or merely link (or bind by name) to the interfaces of, the Work and Derivative Works thereof.  \"Contribution\" shall mean any work of authorship, including the original version of the Work and any modifications or additions to that Work or Derivative Works thereof, that is intentionally submitted to Licensor for inclusion in the Work by the copyright owner or by an individual or Legal Entity authorized to submit on behalf of the copyright owner. For the purposes of this definition, \"submitted\" means any form of electronic, verbal, or written communication sent to the Licensor or its representatives, including but not limited to communication on electronic mailing lists, source code control systems, and issue tracking systems that are managed by, or on behalf of, the Licensor for the purpose of discussing and improving the Work, but excluding communication that is conspicuously marked or otherwise designated in writing by the copyright owner as \"Not a Contribution.\"  \"Contributor\" shall mean Licensor and any individual or Legal Entity on behalf of whom a Contribution has been received by Licensor and subsequently incorporated within the Work.  2. Grant of Copyright License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare Derivative Works of, publicly display, publicly perform, sublicense, and distribute the Work and such Derivative Works in Source or Object form.  3. Grant of Patent License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable (except as stated in this section) patent license to make, have made, use, offer to sell, sell, import, and otherwise transfer the Work, where such license applies only to those patent claims licensable by such Contributor that are necessarily infringed by their Contribution(s) alone or by combination of their Contribution(s) with the Work to which such Contribution(s) was submitted. 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