Update app.py

app.py

@@ -55,7 +55,7 @@ def train_and_forecast(
     except AttributeError:
         raise gr.Error("Upload a file with the Upload button")
     for i in range(prediction_length//2):
-        df.append({'ds': f'predict_{i}', 'y': 0})
+        df.loc[len(df.index)] = [f'predict_{i}', 0]
 
     row_offset = offset_calculation(prediction_length, rolling_windows, len(df))
     # prediction_length += int(len(df) * 0.1)