[FIX] deprication warnings

app.py

@@ -1,12 +1,22 @@
-from langchain.document_loaders import PyMuPDFLoader
+import warnings
+
+from langchain_core._api import LangChainDeprecationWarning
+
+warnings.filterwarnings("ignore", category=DeprecationWarning)
+warnings.filterwarnings("ignore", category=UserWarning)
+warnings.filterwarnings("ignore", category=LangChainDeprecationWarning)
+
+from langchain_community.document_loaders import PyMuPDFLoader
 from langchain.text_splitter import SentenceTransformersTokenTextSplitter
-from langchain.embeddings import SentenceTransformerEmbeddings
-from langchain.retrievers import BM25Retriever
+from langchain_community.embeddings import SentenceTransformerEmbeddings
+from langchain_community.retrievers import BM25Retriever
 from langchain_community.vectorstores.utils import DistanceStrategy
-from langchain.vectorstores import FAISS
+from  langchain_community.vectorstores import FAISS
 import gradio as gr
 import re
 
+print('All imports are successful')
+
 model = "msmarco-distilbert-base-tas-b"
 embeddings = SentenceTransformerEmbeddings(model_name=model)
 prev_files = None