∞🧙🏼‍♂️AnyClassifier - One Line To Build Zero-Data Classifiers in Minutes, And A Step Towards The First AI ML Engineer

Have you ever wanted/ been requested to build a classifier without any data? What it takes now is just one line 🤯.

AnyClassifier is a framework that empowers you to create high-performance classifiers without any labels or data, using minimal code. It's designed to revolutionize the machine learning development process by eliminating the need for extensive data curation and labeling.

🚀 Key Features

• Zero Data Required: Build classifiers from scratch, even without a dataset
• Competitive Result: Achieving competitive results with synthetic data, comparable to using real data 🚀 - See Benchmark
• Multilingual Synthetic Data Generation: Supports generating whatever language as long as your LLM model can.
• One-Line Implementation: Democratizing AI for everyone, and agent (as a plugin for agentic flow)
• LLM-Powered Synthetic Data and Annotations: Leverage SOTA LLM for high-quality synthetic data generation and labeling - See approach
• Designed for Real-World Use: Created by ML engineers, for ML and software engineers

🎯 Why AnyClassifier?

As machine learning engineers, we understand the challenges of building and curating high-quality labeled datasets.
The challenge amplifies when you want to build a multilingual dataset.
AnyClassifier eliminates this bottleneck, allowing you to focus on what matters most - solving real-world problems.

🏁 QuickStart in Apple Silicon - Train a model in 5 min!

Expand

# install (cp39 = python3.9, other valid values are cp310, cp311, cp312)
curl -L -O https://github.com/abetlen/llama-cpp-python/releases/download/v0.2.88-metal/llama_cpp_python-0.2.88-cp39-cp39-macosx_11_0_arm64.whl
pip install llama_cpp_python-0.2.88-cp39-cp39-macosx_11_0_arm64.whl
rm llama_cpp_python-0.2.88-cp39-cp39-macosx_11_0_arm64.whl
pip install anyclassifier
# run
cd examples
python train_setfit_model_imdb.py

🏁 QuickStart in Colab

Dataset	Colab Link
No Data!
imdb sentiment classification

🛠️ Usage

Download a small LLM (please accept the respective terms and condition of model license beforehand)

meta-llama/Meta-Llama-3.1-8B-Instruct
google/gemma-2-9b

from huggingface_hub import hf_hub_download

# meta-llama/Meta-Llama-3.1-8B-Instruct
hf_hub_download("lmstudio-community/Meta-Llama-3.1-8B-Instruct-GGUF", "Meta-Llama-3.1-8B-Instruct-Q8_0.gguf")

# google/gemma-2-9b
hf_hub_download("lmstudio-community/gemma-2-9b-it-GGUF", "gemma-2-9b-it-Q8_0.gguf")

One Liner For No Data

from huggingface_hub import hf_hub_download
from anyclassifier import train_anyclassifier
from anyclassifier.llm.llm_client import LlamaCppClient
from anyclassifier.schema import Label

# Magic One Line!
trainer = train_anyclassifier(
  "Classify a text's sentiment.",
  [
    Label(id=1, desc='positive sentiment'),
    Label(id=0, desc='negative sentiment')
  ],
  LlamaCppClient(hf_hub_download(
    "lmstudio-community/Meta-Llama-3.1-8B-Instruct-GGUF", "Meta-Llama-3.1-8B-Instruct-Q8_0.gguf" # as you like
  ))
)
# Share Your Model!
trainer.push_to_hub("user_id/any_model")

One Liner For Unlabeled Data

from huggingface_hub import hf_hub_download
from anyclassifier import train_anyclassifier
from anyclassifier.llm.llm_client import LlamaCppClient
from anyclassifier.schema import Label

unlabeled_dataset  # a huggingface datasets.Dataset class can be from your local json/ csv, or from huggingface hub.

# Magic One Line!
trainer = train_anyclassifier(
  "Classify a text's sentiment.",
  [
    Label(id=1, desc='positive sentiment'),
    Label(id=0, desc='negative sentiment')
  ],
  LlamaCppClient(hf_hub_download(
    "lmstudio-community/Meta-Llama-3.1-8B-Instruct-GGUF", "Meta-Llama-3.1-8B-Instruct-Q8_0.gguf" # as you like
  )),
  unlabeled_dataset
)
# Share Your Model!
trainer.push_to_hub("user_id/any_model")

To Use Model

# SetFit
from setfit import SetFitModel

model = SetFitModel.from_pretrained("user_id/any_model")
preds = model.predict(["i loved the spiderman movie!", "pineapple on pizza is the worst 🤮"])
print(preds)

# FastText
from anyclassifier.fasttext_wrapper import FastTextForSequenceClassification

model = FastTextForSequenceClassification.from_pretrained("user_id/any_model")
preds = model.predict(["i loved the spiderman movie!", "pineapple on pizza is the worst 🤮"])
print(preds)

🔧 Installation

It is using llama.cpp as backend, and build wheel can take a lot of time (10min+), as such, we also provide an instruction to install with pre-built wheel.

Metal Backend (Apple's GPU) - cp39 = python3.9, other valid values are cp310, cp311, cp312

curl -L -O https://github.com/abetlen/llama-cpp-python/releases/download/v0.2.88-metal/llama_cpp_python-0.2.88-cp39-cp39-macosx_11_0_arm64.whl
pip install llama_cpp_python-0.2.88-cp39-cp39-macosx_11_0_arm64.whl
rm llama_cpp_python-0.2.88-cp39-cp39-macosx_11_0_arm64.whl
pip install anyclassifier

Colab (T4) Prebuilt Wheel

curl -L -O https://github.com/abetlen/llama-cpp-python/releases/download/v0.2.88-cu124/llama_cpp_python-0.2.88-cp310-cp310-linux_x86_64.whl
pip install llama_cpp_python-0.2.88-cp310-cp310-linux_x86_64.whl
rm llama_cpp_python-0.2.88-cp310-cp310-linux_x86_64.whl
pip install anyclassifier

CUDA Backend (Please read [llama-cpp-python](https://llama-cpp-python.readthedocs.io/en/latest/#installation))

CMAKE_ARGS="-DGGML_METAL=on" pip install anyclassifier

CPU

CMAKE_ARGS="-DGGML_BLAS=ON -DGGML_BLAS_VENDOR=OpenBLAS" pip install anyclassifier

Developer's installation

pip install -e .

Other Usages

Use OpenAI instead of LlamaCpp, enabling concurrency

from anyclassifier.schema import Label
from anyclassifier.llm.llm_client import OpenAIClient
from anyclassifier.train_any import train_anyclassifier

trainer = train_anyclassifier(
  "Classify a text's sentiment.",
  [
    Label(id=1, desc='positive sentiment'),
    Label(id=0, desc='negative sentiment')
  ],
  OpenAIClient(api_key="<YOUR_OPENAI_API_KEY>", model="gpt-4o-mini"),
  generation_concurrency=10,
  labeling_concurrency=10
)

To Label a Dataset

from datasets import load_dataset
from anyclassifier.annotation.prompt import AnnotationPrompt
from anyclassifier.llm.llm_client import LlamaCppClient
from anyclassifier.schema import Label
from anyclassifier.annotation.annotator import LLMAnnotator

unlabeled_dataset = load_dataset("somepath")
prompt = AnnotationPrompt(
  task_description="Classify a text's sentiment.",
  label_definition=[
      Label(id=0, desc='negative sentiment'),
      Label(id=1, desc='positive sentiment')
  ]  
)
annotator = LLMAnnotator(LlamaCppClient(), prompt)
label_dataset = annotator.annotate_dataset(unlabeled_dataset, n_record=1000)
label_dataset.push_to_hub('user_id/any_data')

To Generate a Synthetic Dataset

from anyclassifier.schema import Label
from anyclassifier.synthetic_data_generation import SyntheticDataGeneratorForSequenceClassification
from anyclassifier.llm.llm_client import LlamaCppClient

tree_constructor = SyntheticDataGeneratorForSequenceClassification(LlamaCppClient())
dataset = tree_constructor.generate(
    "Classify a text's sentiment.",
    [
        Label(id=0, desc='negative sentiment'),
        Label(id=1, desc='positive sentiment')
    ]
)
dataset.push_to_hub('user_id/any_data')

See more examples in examples

dataset	approach	model_type	example	resulting model	dataset
"stanfordnlp/imdb" like	synthetic data generation	setfit	link	link	link
stanfordnlp/imdb	annotation	setfit	link	link	link
"zeroshot/twitter-financial-news-sentiment" like	synthetic data generation	setfit	link	link	link
zeroshot/twitter-financial-news-sentiment	annotation	setfit	link	link	link
"ccdv/arxiv-classification" like	synthetic data generation	setfit	link	link	link
ccdv/arxiv-classification	annotation	setfit	link	link	link
"lmsys/toxic-chat, toxicchat0124" like	synthetic data generation	setfit	link	link	link
lmsys/toxic-chat, toxicchat0124	annotation	setfit	link	link	link
"fancyzhx/ag_news" like	synthetic data generation	setfit	link	link	link
fancyzhx/ag_news	annotation	setfit	link	link	link
chinese sentiment	synthetic data generation	N/A	link	-	link

🧪Benchmark

The objective is to see if synthetic data is performing as well as real data (annotation). Full training dataset indicates the upper limit of performance as more data is available. Model performance of synthetic data is at par with/ close to that of real data, which is not bad because the testing data is usually by design more similar to training (real) data than synthetic data. We also note that synthetic data is also advantageous when class is highly imbalanced like the toxic chat problem.
Our benchmark implies the synthetic data generated is close to the distribution of test data, showing the effectiveness of this synthetic data generation approach, without using any real data.
All models finetune on sentence-transformers/paraphrase-mpnet-base-v2 (109M). The performance can be boosted by using a larger base model and generating more data.

dataset	metric	synthetic data generation	annotation	full training dataset	full training reference
stanfordnlp/imdb	accuracy	0.878	0.908	0.928	lvwerra/distilbert-imdb
zeroshot/twitter-financial-news-sentiment	f1 (weighted)	0.631	0.676	0.866	nickmuchi/finbert-tone-finetuned-fintwitter-classification
ccdv/arxiv-classification	accuracy	0.618	0.566	0.805	paper
lmsys/toxic-chat, toxicchat0124	f1 (binary)	0.362	0.00*	0.822	lmsys/toxicchat-t5-large-v1.0
fancyzhx/ag_news	accuracy	0.768	0.765	0.938	fabriceyhc/bert-base-uncased-ag_news

* Out of 42 annotations, only 2 labels is positive, making learning hard.

Codes to replicate is stored in examples. We will continue to add more benchmark on other datasets.

📜 Documentation

See docs on our detailed methodology and documentation.

🗺️ Roadmap

• High Quality Data:
  • Prompt validation
  • Label validation - inter-model annotation
  • R&D in synthetic data generation
• High Quality Model
  • Auto error analysis
  • Auto model documentation
  • Auto targeted synthetic data
• More Benchmarking
• Multilingual Support

👋 Contributing

• build models with AnyClassifier
• suggest features
• create issue/ PR
• benchmarking synthetic data generation vs annotation vs full training dataset

📄 License

AnyClassifier is released under the MIT License.

🤝🏻 Credits

Without these open source models and libraries, this project would not have been possible.

• powerful open source and consumer friendly LLMs e.g. Llama 3.1 8B and Gemma 2 9B
• llama.cpp and llama-cpp-python
• setfit
• huggingface ecosystem

📖 Citation

If you like this work, please cite:

@software{Tsui_AnyClassifier_2024,
author = {Tsui, Ken},
month = {8},
title = {{AnyClassifier}},
url = {https://github.com/kenhktsui/anyclassifier},
year = {2024}
}

📩 Follow Me For Update:

X/ huggingface/ github