安装依赖
pip install -qU langchain-core langchain-openai
编写代码
我们将通过：get_openai_callback 函数，LangChain 已经帮我们封装好了。
此时我们通过该回调函数，变可以完成对消费的计算和统计。
from langchain.callbacks import get_openai_callback from langchain_openai import ChatOpenAI llm = ChatOpenAI( model="gpt-3.5-turbo", ) with get_openai_callback() as cb: result = llm.invoke("Tell me a joke") print(cb)
运行结果
➜ python3 test19.py /Users/wuzikang/Desktop/py/langchain_test/own_learn/env/lib/python3.12/site-packages/langchain/callbacks/__init__.py:37: LangChainDeprecationWarning: Importing this callback from langchain is deprecated. Importing it from langchain will no longer be supported as of langchain==0.2.0. Please import from langchain-community instead: `from langchain_community.callbacks import get_openai_callback`. To install langchain-community run `pip install -U langchain-community`. warnings.warn( Tokens Used: 26 Prompt Tokens: 12 Completion Tokens: 14 Successful Requests: 1 Total Cost (USD): $4.6e-05
