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Site Navigation

  • Core
  • Langchain
  • Text Splitters
  • AI21
  • Airbyte
    • Anthropic
    • AstraDB
    • AWS
    • Azure Dynamic Sessions
    • Chroma
    • Cohere
    • Couchbase
    • Elasticsearch
    • Exa
    • Fireworks
    • Google Community
    • Google GenAI
    • Google VertexAI
    • Groq
    • Huggingface
    • Milvus
    • MistralAI
    • MongoDB
    • Nomic
    • Nvidia Ai Endpoints
    • Ollama
    • OpenAI
    • Pinecone
    • Postgres
    • Prompty
    • Qdrant
    • Robocorp
    • Together
    • Unstructured
    • VoyageAI
    • Weaviate
  • LangChain docs
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Section Navigation

  • callbacks
    • UsageCallbackHandler
    • get_token_cost_for_model
    • get_usage_callback
    • standardize_model_name
  • chat_models
  • embeddings
  • reranking
  • tools
  • langchain_nvidia_ai_endpoints 0.2.1

callbacks#

Callback Handler that prints to std out.

Classes

callbacks.UsageCallbackHandler()

Callback Handler that tracks OpenAI info.

Functions

callbacks.get_token_cost_for_model(...[, ...])

Get the cost in USD for a given model and number of tokens.

callbacks.get_usage_callback([price_map, ...])

Get the OpenAI callback handler in a context manager.

callbacks.standardize_model_name(model_name)

Standardize the model name to a format that can be used in the OpenAI API.

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langchain_nvidia_ai_endpoints 0.2.1

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UsageCallbackHandler

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