Lagnet

What's Lagent?

Lagent is a lightweight open-source framework that allows users to efficiently build large language model(LLM)-based agents. It also provides some typical tools to augment LLM. The overview of the framework is shown below:

This document primarily highlights the basic usage of Lagent. For a comprehensive understanding of the toolkit, please refer to examples for more details.

Installation

Install with pip (Recommended).

pip install lagent

Optionally, you could also build Lagent from source in case you want to modify the code:

git clone https://github.com/InternLM/lagent.git
cd lagent
pip install -e .

Run ReAct Web Demo

# You need to install streamlit first
# pip install streamlit
streamlit run examples/react_web_demo.py

Then you can chat through the UI shown as below

Run a ReAct agent with InternLM2.5-Chat

NOTE: If you want to run a HuggingFace model, please run pip install -e .[all] first.

# Import necessary modules and classes from the "lagent" library.
from lagent.agents import ReAct
from lagent.actions import ActionExecutor, GoogleSearch, PythonInterpreter
from lagent.llms import HFTransformer

# Initialize the HFTransformer-based Language Model (llm) and provide the model name.
llm = HFTransformer('internlm/internlm2_5-7b-chat')

# Initialize the Google Search tool and provide your API key.
search_tool = GoogleSearch(api_key='Your SERPER_API_KEY')

# Initialize the Python Interpreter tool.
python_interpreter = PythonInterpreter()

# Create a chatbot by configuring the ReAct agent.
chatbot = ReAct(
    llm=llm,  # Provide the Language Model instance.
    action_executor=ActionExecutor(
        actions=[search_tool, python_interpreter]  # Specify the actions the chatbot can perform.
    ),
)
# Ask the chatbot a mathematical question in LaTeX format.
response = chatbot.chat('若$z=-1+\sqrt{3}i$,则$\frac{z}{{z\overline{z}-1}}=\left(\ \ \right)$')

# Print the chatbot's response.
print(response.response)  # Output the response generated by the chatbot.
>>> $-\\frac{1}{3}+\\frac{{\\sqrt{3}}}{3}i$

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