Update app.py

app.py

@@ -4,12 +4,12 @@ import os
 from langchain.document_loaders import OnlinePDFLoader
 
 from langchain.text_splitter import CharacterTextSplitter
-text_splitter = CharacterTextSplitter(chunk_size=350, chunk_overlap=0)
+
 
 from langchain.llms import OpenAI
 
 from langchain.embeddings import OpenAIEmbeddings
-embeddings = OpenAIEmbeddings()
+
 
 from langchain.vectorstores import Chroma
 
@@ -23,7 +23,9 @@ def pdf_changes(pdf_doc, open_ai_key):
         os.environ['OPENAI_API_KEY'] = open_ai_key
         loader = OnlinePDFLoader(pdf_doc.name)
         documents = loader.load()
+        text_splitter = CharacterTextSplitter(chunk_size=350, chunk_overlap=0)
         texts = text_splitter.split_documents(documents)
+        embeddings = OpenAIEmbeddings()
         db = Chroma.from_documents(texts, embeddings)
         retriever = db.as_retriever()
         global qa