update mongo template (#12838)
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import os
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from langchain.document_loaders import PyPDFLoader
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from langchain.embeddings import OpenAIEmbeddings
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from langchain.text_splitter import RecursiveCharacterTextSplitter
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from langchain.vectorstores import MongoDBAtlasVectorSearch
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from pymongo import MongoClient
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MONGO_URI = os.environ["MONGO_URI"]
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# Note that if you change this, you also need to change it in `rag_mongo/chain.py`
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DB_NAME = "langchain-test-2"
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COLLECTION_NAME = "test"
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ATLAS_VECTOR_SEARCH_INDEX_NAME = "default"
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EMBEDDING_FIELD_NAME = "embedding"
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client = MongoClient(MONGO_URI)
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db = client[DB_NAME]
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MONGODB_COLLECTION = db[COLLECTION_NAME]
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if __name__ == "__main__":
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# Load docs
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loader = PyPDFLoader("https://arxiv.org/pdf/2303.08774.pdf")
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data = loader.load()
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# Split docs
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text_splitter = RecursiveCharacterTextSplitter(chunk_size=500, chunk_overlap=0)
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docs = text_splitter.split_documents(data)
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# Insert the documents in MongoDB Atlas Vector Search
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_ = MongoDBAtlasVectorSearch.from_documents(
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documents=docs,
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embedding=OpenAIEmbeddings(disallowed_special=()),
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collection=MONGODB_COLLECTION,
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index_name=ATLAS_VECTOR_SEARCH_INDEX_NAME,
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)
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