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import streamlit as st |
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from haystack import Pipeline |
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from haystack.document_stores import FAISSDocumentStore |
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from haystack.nodes import Shaper, PromptNode, PromptTemplate, PromptModel, EmbeddingRetriever |
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from haystack.nodes.retriever.web import WebRetriever |
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@st.cache_resource(show_spinner=False) |
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def get_plain_pipeline(): |
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prompt_open_ai = PromptModel(model_name_or_path="text-davinci-003", api_key=st.secrets["OPENAI_API_KEY"]) |
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plain_llm_template = PromptTemplate(name="plain_llm", prompt_text="Answer the following question: $query") |
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node_openai = PromptNode(prompt_open_ai, default_prompt_template=plain_llm_template, max_length=300) |
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pipeline = Pipeline() |
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pipeline.add_node(component=node_openai, name="prompt_node", inputs=["Query"]) |
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return pipeline |
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@st.cache_resource(show_spinner=False) |
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def get_retrieval_augmented_pipeline(): |
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ds = FAISSDocumentStore(faiss_index_path="data/my_faiss_index.faiss", |
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faiss_config_path="data/my_faiss_index.json") |
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retriever = EmbeddingRetriever( |
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document_store=ds, |
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embedding_model="sentence-transformers/multi-qa-mpnet-base-dot-v1", |
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model_format="sentence_transformers", |
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top_k=2 |
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) |
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shaper = Shaper(func="join_documents", inputs={"documents": "documents"}, outputs=["documents"]) |
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default_template = PromptTemplate( |
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name="question-answering", |
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prompt_text="Given the context please answer the question. Context: $documents; Question: " |
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"$query; Answer:", |
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) |
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node = PromptNode("text-davinci-003", default_prompt_template=default_template, |
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api_key=st.secrets["OPENAI_API_KEY"], max_length=500) |
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pipeline = Pipeline() |
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pipeline.add_node(component=retriever, name='retriever', inputs=['Query']) |
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pipeline.add_node(component=shaper, name="shaper", inputs=["retriever"]) |
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pipeline.add_node(component=node, name="prompt_node", inputs=["shaper"]) |
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return pipeline |
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@st.cache_resource(show_spinner=False) |
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def get_web_retrieval_augmented_pipeline(): |
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search_key = st.secrets["WEBRET_API_KEY"] |
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web_retriever = WebRetriever(api_key=search_key, search_engine_provider="SerperDev") |
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shaper = Shaper(func="join_documents", inputs={"documents": "documents"}, outputs=["documents"]) |
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default_template = PromptTemplate( |
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name="question-answering", |
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prompt_text="Given the context please answer the question. Context: $documents; Question: " |
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"$query; Answer:", |
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) |
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node = PromptNode("text-davinci-003", default_prompt_template=default_template, |
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api_key=st.secrets["OPENAI_API_KEY"], max_length=500) |
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pipeline = Pipeline() |
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pipeline.add_node(component=web_retriever, name='retriever', inputs=['Query']) |
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pipeline.add_node(component=shaper, name="shaper", inputs=["retriever"]) |
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pipeline.add_node(component=node, name="prompt_node", inputs=["shaper"]) |
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return pipeline |
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