langchain-langchain的go实现.zip

# Chroma Support You can access Chroma via the included implementation of the [`vectorstores.VectorStore` interface](../vectorstores.go) by creating and using a Chroma client `Store` instance with the [`New` function](./chroma.go) API. ## Client/Server Until [an "in-memory" version](https://docs.trychroma.com/usage-guide#running-chroma-in-clientserver-mode) is released, only client/server mode is available. Use the [`WithChromaURL` API](./options.go) or the `CHROMA_URL` environment variable to specify the URL of the Chroma server when creating the client instance. ## Using OpenAI LLM To use the OpenAI LLM with Chroma, use either the [`WithOpenAiAPIKey` API](./options.go) or the `OPENAI_API_KEY` environment variable when creating the client. ## Running With Docker Running a Chroma server in a local docker instance can be especially useful for testing and development workflows. An example invocation scenario is presented below: ### Starting the Chroma Server As of this writing, the newest release of the Chroma docker image is [chroma:0.4.9](https://github.com/chroma-core/chroma/pkgs/container/chroma/125222480?tag=0.4.9). Running it directly while exposing its port to your local machine can be accomplished with: ```shell $ docker run -p 8000:8000 ghcr.io/chroma-core/chroma:0.4.9 ``` ### Running an Example `langchaingo` Application With the "Simple Docker Server" running (see above), running the included example `langchaingo` app should produce the following result: ```shell $ export CHROMA_URL=localhost:8000 $ export OPENAI_API_KEY=YourOpenApiKeyGoesHere $ go run ./examples/chroma-vectorstore-example/chroma_vectorstore_example.go Results: 1. case: Up to 5 Cities in Japan result: Tokyo, Nagoya, Kyoto, Fukuoka, Hiroshima 2. case: A City in South America result: Buenos Aires 3. case: Large Cities in South America result: Sao Paulo, Rio de Janeiro ``` ## Tests The test suite `chroma_test.go` started as a clone of the adjacent `pinecone_test.go`, and is initially quite sparse. Consider contributing new test cases, or adding coverage to accompany any changes made to the code.