Update app.py

app.py

@@ -32,8 +32,11 @@ def main():
 
 def display_signals(signals):
     for signal in signals:
-        st.write(f"Date: {signal['date']}")
-        st.write(f"Signal: {signal['signal']}")
+        if isinstance(signal, dict):
+            st.write(f"Date: {signal.get('date', 'N/A')}")
+            st.write(f"Signal: {signal.get('signal', 'N/A')}")
+        else:
+            st.write("Invalid signal format.")
 
 if __name__ == "__main__":
     main()