Update app.py

app.py

@@ -135,6 +135,8 @@ def generate_answer(question,openAI_key):
 
 
 def question_answer(url, file, question,openAI_key):
+    if openAI_key.strip()=='':
+        return '[ERROR]: Please enter you Open AI Key. Get your key here : https://platform.openai.com/account/api-keys'
     if url.strip() == '' and file == None:
         return '[ERROR]: Both URL and PDF is empty. Provide atleast one.'
     
@@ -176,6 +178,7 @@ with gr.Blocks() as demo:
     with gr.Row():
         
         with gr.Group():
+            gr.Markdown(f'<p style="text-align:center">Get your Open AI API key <a href="https://platform.openai.com/account/api-keys">here</a></p>')
             openAI_key=gr.Textbox(label='Enter your OpenAI API key here')
             url = gr.Textbox(label='Enter PDF URL here')
             gr.Markdown("<center><h4>OR<h4></center>")