Update app.py

app.py

@@ -48,6 +48,7 @@ def main():
     if st.button("upload show"):
             with st.spinner("showing"):
                 #get pdf text
+                from langchain.text_splitter import CharacterTextSplitter
                 raw_text=get_pdf_text(pdf_docs)
                 text_splitter = CharacterTextSplitter(chunk_size=300, chunk_overlap=20)
                 docs = text_splitter.split_documents(raw_text)