Rare Earth Juejin Tech Community
Jan 20, 2024 · Artificial Intelligence
Understanding LangChain Callback Mechanism, Custom Async Handlers, and Token Cost Management in Python
This article introduces LangChain's callback mechanism, demonstrates how to implement custom synchronous and asynchronous callbacks in Python, compares them with JavaScript async patterns, and shows how to monitor token usage and control costs using OpenAI callbacks.
LLMLangChainPython
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