XML Agent

Some language models (like Anthropic's Claude) are particularly good at reasoning/writing XML. This goes over how to use an agent that uses XML when prompting.

from langchain.agents import XMLAgent, tool, AgentExecutor
from langchain.chat_models import ChatAnthropic
from langchain.chains import LLMChain

API Reference:

• XMLAgent from langchain.agents
• tool from langchain.agents
• AgentExecutor from langchain.agents
• ChatAnthropic from langchain.chat_models
• LLMChain from langchain.chains

model = ChatAnthropic(model="claude-2")

@tool
def search(query: str) -> str:
    """Search things about current events."""
    return "32 degrees"

tool_list = [search]

chain = LLMChain(
    llm=model,
    prompt=XMLAgent.get_default_prompt(),
    output_parser=XMLAgent.get_default_output_parser()
)
agent = XMLAgent(tools=tool_list, llm_chain=chain)

agent_executor = AgentExecutor(agent=agent, tools=tool_list, verbose=True)

agent_executor.run("whats the weather in New york?")

    
    
    > Entering new AgentExecutor chain...
     <tool>search</tool>
    <tool_input>weather in New York32 degrees
    
    <final_answer>The weather in New York is 32 degrees
    
    > Finished chain.





    'The weather in New York is 32 degrees'