Update PDF_Reader.py

PDF_Reader.py

@@ -1,7 +1,7 @@
 from langchain_experimental.text_splitter import SemanticChunker
 from langchain_chroma import Chroma
 from langchain_community.document_loaders import PyPDFLoader
-
+from langchain.embeddings import HuggingFaceEmbeddings
 embedding_modelPath = "sentence-transformers/all-MiniLM-l6-v2"
 embeddings = HuggingFaceEmbeddings(model_name=embedding_modelPath,model_kwargs = {'device':'cpu'},encode_kwargs = {'normalize_embeddings': False})