LangChain 简介

模型接口

1type Model interface {
2	GenerateContent(ctx context.Context, messages []MessageContent, options ...CallOption) (*ContentResponse, error)
3}

嵌入器接口

1type Embedder interface {
2	EmbedDocuments(ctx context.Context, texts []string) ([][]float32, error)
3	// EmbedQuery 
4	EmbedQuery(ctx context.Context, text string) ([]float32, error)
5}

加载器接口

1type Loader interface {
2	Load(ctx context.Context) ([]schema.Document, error)
3	LoadAndSplit(ctx context.Context, splitter textsplitter.TextSplitter) ([]schema.Document, error)
4}

代码示例

1txtFile, _ := os.Open("/Users/home/myfile.txt")
2loader := documentloaders.NewText(txtFile)
3docs, _ := loader.Load(context.Background())

链式调用接口

1type Chain interface {
2	Call(ctx context.Context, inputs map[string]any, options ...ChainCallOption) (map[string]any, error)
3	GetMemory() schema.Memory
4	GetInputKeys() []string
5	GetOutputKeys() []string
6}

检索器接口

1type Retriever interface {
2	GetRelevantDocuments(ctx context.Context, query string) ([]Document, error)
3}

记忆接口

1type Memory interface {
2	GetMemoryKey(ctx context.Context) string
3	MemoryVariables(ctx context.Context) []string
4	LoadMemoryVariables(ctx context.Context, inputs map[string]any) (map[string]any, error)
5	SaveContext(ctx context.Context, inputs map[string]any, outputs map[string]any) error
6	Clear(ctx context.Context) error
7}