Update app.py

app.py

@@ -25,11 +25,13 @@ st.header("Welcome!. Today, What company's sustainability story is inspiring you
 
 myurl = st.text_input("Give the URL to find a sustainability or annual report", "Type URL of any company PDF document here")
 
+index = None
+
 if st.button("Load this report "):
     loader1 = PyPDFLoader(myurl)
     langchainembeddings = OpenAIEmbeddings(deployment="textembedding", chunk_size=1)
 
-    index = VectorstoreIndexCreator(
+index = VectorstoreIndexCreator(
         # split the documents into chunks
         text_splitter=CharacterTextSplitter(chunk_size=1000, chunk_overlap=0),
         # select which embeddings we want to use
@@ -38,7 +40,7 @@ if st.button("Load this report "):
         vectorstore_cls=Chroma
     ).from_loaders([loader1])
     
-    st.write("loaded")
+st.write("loaded")