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from langchain.agents import AgentExecutor
from langchain_anthropic import ChatAnthropic
from langchain_core.output_parsers import StrOutputParser
from langchain_core.prompts import ChatPromptTemplate
from langchain_core.runnables import RunnableParallel, RunnablePassthrough
from .agent_scratchpad import format_agent_scratchpad
from .output_parser import parse_output
from .prompts import retrieval_prompt
from .retriever import retriever_description, search
prompt = ChatPromptTemplate.from_messages(
[
("user", retrieval_prompt),
("ai", "{agent_scratchpad}"),
]
)
prompt = prompt.partial(retriever_description=retriever_description)
model = ChatAnthropic(
model="claude-3-sonnet-20240229", temperature=0, max_tokens_to_sample=1000
)
chain = (
RunnablePassthrough.assign(
agent_scratchpad=lambda x: format_agent_scratchpad(x["intermediate_steps"])
)
| prompt
| model.bind(stop_sequences=["</search_query>"])
| StrOutputParser()
)
agent_chain = (
RunnableParallel(
{
"partial_completion": chain,
"intermediate_steps": lambda x: x["intermediate_steps"],
}
)
| parse_output
)
executor = AgentExecutor(agent=agent_chain, tools=[search], verbose=True)
|