LangChain

LangChain Example

The examples in this folder shows how to use LangChain with ipex-llm on Intel CPU.

Tip

For more information, please refer to the upstream LangChain LLM documentation with IPEX-LLM here, and upstream LangChain embedding model documentation with IPEX-LLM here.

0. Requirements

To run these examples with IPEX-LLM, we have some recommended requirements for your machine, please refer to here for more information.

1. Install

We suggest using conda to manage environment:

On Linux:

conda create -n llm python=3.11
conda activate llm

# install ipex-llm with 'all' option
pip install --pre --upgrade ipex-llm[all] --extra-index-url https://download.pytorch.org/whl/cpu

On Windows:

onda create -n llm python=3.11
conda activate llm

pip install --pre --upgrade ipex-llm[all]

2. Run examples with LangChain

2.1. Example: Streaming Chat

Install LangChain dependencies:

pip install -U langchain langchain-community

In the current directory, run the example with command:

python chat.py -m MODEL_PATH -q QUESTION

Additional Parameters for Configuration:

• -m MODEL_PATH: required, path to the model
• -q QUESTION: question to ask. Default is What is AI?.

2.2. Example: Retrival Augmented Generation (RAG)

The RAG example (rag.py) shows how to load the input text into vector database, and then use LangChain to build a retrival pipeline.

Install LangChain dependencies:

pip install -U langchain langchain-community langchain-chroma sentence-transformers==3.0.1

In the current directory, run the example with command:

python rag.py -m <path_to_llm_model> -e <path_to_embedding_model> [-q QUESTION] [-i INPUT_PATH]

Additional Parameters for Configuration:

• -m LLM_MODEL_PATH: required, path to the model.
• -e EMBEDDING_MODEL_PATH: required, path to the embedding model.
• -q QUESTION: question to ask. Default is What is IPEX-LLM?.
• -i INPUT_PATH: path to the input doc.

2.3. Example: Low Bit

The low_bit example (low_bit.py) showcases how to use use LangChain with low_bit optimized model. By save_low_bit we save the weights of low_bit model into the target folder.

Note

save_low_bit only saves the weights of the model. Users could copy the tokenizer model into the target folder or specify tokenizer_id during initialization.

Install LangChain dependencies:

pip install -U langchain langchain-community

In the current directory, run the example with command:

python low_bit.py -m <path_to_model> -t <path_to_target> [-q <your question>]

Additional Parameters for Configuration:

• -m MODEL_PATH: Required, the path to the model
• -t TARGET_PATH: Required, the path to save the low_bit model
• -q QUESTION: question to ask. Default is What is AI?.

2.4. Example: Math

The math example (math.py) shows how to build a chat pipeline specialized in solving math questions. For example, you can ask What is 13 raised to the .3432 power?

Install LangChain dependencies:

pip install -U langchain langchain-community

In the current directory, run the example with command:

python llm_math.py -m <path_to_model> [-q <your_question>]

Additional Parameters for Configuration:

• -m MODEL_PATH: Required, the path to the model
• -q QUESTION: question to ask. Default is What is 13 raised to the .3432 power?.

Note

If -q is not specified, it will use What is 13 raised to the .3432 power? by default.

2.5. Example: Voice Assistant

The voice assistant example (voiceassistant.py) showcases how to use LangChain to build a pipeline that takes in your speech as input in realtime, use an ASR model (e.g. Whisper-Medium) to turn speech into text, and then feed the text into large language model to get response.

Install LangChain dependencies:

pip install -U langchain langchain-community
pip install transformers==4.36.2

To run the exmaple, execute the following command in the current directory:

python voiceassistant.py -m <path_to_model> -r <path_to_recognition_model> [-q <your_question>]

Additional Parameters for Configuration:

• -m MODEL_PATH: Required, the path to the
• -r RECOGNITION_MODEL_PATH: Required, the path to the huggingface speech recognition model
• -x MAX_NEW_TOKENS: the max new tokens of model tokens input
• -l LANGUAGE: you can specify a language such as "english" or "chinese"
• -d True|False: whether the model path specified in -m is saved low bit model.