Update app.py

app.py

@@ -51,12 +51,12 @@ if 'player_move' in locals():
 if "chat" not in st.session_state:
     st.session_state.chat = model.start_chat(history = [
         {
-            role: 'user',
-            parts: 'You are playing a random rock paper scissor game. For rock will say "Rock", for paper will say "Paper" and for scissor will say "Scissor".  Pick a random word out of three and reply once I do my move.'
+            "role": 'user',
+            "parts": 'You are playing a random rock paper scissor game. For rock will say "Rock", for paper will say "Paper" and for scissor will say "Scissor".  Pick a random word out of three and reply once I do my move.'
         },
         {
-            role: 'model',
-            parts: 'Alright, let us play a random Rock-Paper-Scissors game. Make your first move!'
+            "role": 'model',
+            "parts": 'Alright, let us play a random Rock-Paper-Scissors game. Make your first move!'
         }
     ])