Update app.py

app.py

@@ -10,6 +10,9 @@ from langchain.chains import RetrievalQA # for conversing with chatGPT
 from langchain.chat_models import ChatOpenAI # the LLM model we'll use (ChatGPT)
 
 
+def loading_pdf():
+   return "Loading..."
+
 def load_pdf(pdf_doc, open_ai_key):
     if openai_key is not None:
         os.environ['OPENAI_API_KEY'] = open_ai_key
@@ -46,21 +49,26 @@ css = """container{max-width:700px; margin-left:auto; margin-right:auto,padding:
 with gr.Blocks(css=css,theme=gr.themes.Monochrome()) as demo:
     gr.HTML(html)
     with gr.Column():
-        gr.Markdown('ChatPDF')
-        openai_key = gr.Textbox(label="Your OpenAI API key", type="password")
+        openai_key = gr.Textbox(label="Your GPT-4 OpenAI API key", type="password")
         pdf_doc = gr.File(label="Load a pdf",file_types=['.pdf'],type='file')
         with gr.Row():
-            load_pdf = gr.Button('Load pdf file')
-            status = gr.Textbox(label="Status",placeholder='',interactive=False)
+                langchain_status = gr.Textbox(label="Status", placeholder="", interactive=False)
+                load_pdf = gr.Button("Load PDF to LangChain")
+        
+        chatbot = gr.Chatbot([], elem_id="chatbot").style(height=350)
+        question = gr.Textbox(label="Question", placeholder="Type your question and hit Enter ")
+        submit_btn = gr.Button("Send Message")
+    load_pdf.click(loading_pdf, None, langchain_status, queue=False)    
+    load_pdf.click(load_pdf, inputs=[pdf_doc, openai_key], outputs=[langchain_status], queue=False)
+        
+    question.submit(answer_query, [question], [question]).then(
+        bot, chatbot, chatbot
+    )
+    submit_btn.click(answer_query, [chatbot,question], [chatbot, question]).then(
+        bot, chatbot, chatbot)
 
 
-        with gr.Row():
-            input = gr.Textbox(label="Type in your question")
-            output = gr.Textbox(label="output")
-        submit_query = gr.Button("submit")
+demo.launch()
 
-        load_pdf.click(load_pdf,inputs=[pdf_doc, openai_key],outputs=status)
 
-        submit_query.click(answer_query,input,output)
 
-demo.launch()