Update app.py

app.py

@@ -8,6 +8,7 @@ from langchain.chains import RetrievalQA
 import os
 os.environ['HUGGINGFACEHUB_API_TOKEN'] = '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'
 llm = HuggingFaceHub(repo_id="google/flan-t5-xxl")
+embeddings = HuggingFaceEmbeddings()
 B=open('us.txt')
 Biden=B.read()
 text_splitter = CharacterTextSplitter(chunk_size=1000, chunk_overlap=0)