get_usage_callback#
- langchain_nvidia_ai_endpoints.callbacks.get_usage_callback(price_map: dict = {}, callback: UsageCallbackHandler | None = None) Generator[UsageCallbackHandler, None, None] [source]#
Get the OpenAI callback handler in a context manager. which conveniently exposes token and cost information.
- Returns:
The OpenAI callback handler.
- Return type:
- Parameters:
price_map (dict) –
callback (UsageCallbackHandler | None) –
Example
>>> with get_openai_callback() as cb: ... # Use the OpenAI callback handler