Update app.py

app.py

@@ -66,9 +66,11 @@ def train_and_forecast(
     buffer = io.BytesIO()
     new_df.to_csv(buffer, index=False)
     buffer.seek(0)
-    new_df = pd.read_csv(buffer)
+    df = pd.read_csv(buffer)
+    df.sort_index(inplace=True)
+    df.columns = ['ds', 'y']
     print(new_df)
-    gluon_df = PandasDataset(new_df, target=new_df.columns[0], freq=freq)
+    gluon_df = PandasDataset(df, target=df.columns[0], freq=freq)
     print(gluon_df)
     row_offset = offset_calculation(prediction_length, rolling_windows, len(df))
     # prediction_length += int(len(df) * 0.1)