Update app.py

app.py

@@ -7,7 +7,7 @@ documents = loader.load()
 def summarize_pdf (pdf_file_path, custom_prompt=""):
     loader = PyPDFLoader(pdf_file_path)
     docs = loader.load_and_split()
-    chain = langchain.load_summarize_chain(llm, chain_type="map_reduce")
+    chain = load_summarize_chain(llm, chain_type="map_reduce")
     summary = chain.run(docs)
     
     return summary