开发验证

import langchain
import langchain_core
from langchain_core.prompts import ChatPromptTemplate
from langchain_core.runnables import RunnableLambda
from langchain_text_splitters import RecursiveCharacterTextSplitter

def validate_imports():
    print("langchain=" + langchain.__version__)
    print("langchain_core=" + langchain_core.__version__)

def validate_runnable():
    runnable = RunnableLambda(lambda value: value + 1)
    result = runnable.invoke(1)
    assert result == 2
    print("runnable_result=" + str(result))

def validate_prompt():
    prompt = ChatPromptTemplate.from_template("Hello, {name}!")
    messages = prompt.format_messages(name="ARM")
    assert len(messages) == 1
    assert "ARM" in messages[0].content
    print("prompt_result=" + messages[0].content)

def validate_text_splitter():
    splitter = RecursiveCharacterTextSplitter(chunk_size=20, chunk_overlap=5)
    chunks = splitter.split_text("LangChain runs successfully on ARM platform.")
    assert len(chunks) > 0
    print("chunk_count=" + str(len(chunks)))

if __name__ == "__main__":
    validate_imports()
    validate_runnable()
    validate_prompt()
    validate_text_splitter()
    print("LangChain basic validation passed")

python3 validate_langchain_basic.py