add print log

ai/EstimateMarketTrendV20.py

@@ -102,6 +102,7 @@ if __name__ == '__main__':
     builder = TrainingDataBuilder(index, eco, fund, indexDict, toForecast, win1W, win1M, win1Q, numForecastDays,
                                   theThreshold)
     for pid in PREDICT_LIST:
+        print(f'{indexDict[pid]} start '.center(50, '='))
         t_data = indexData if pid in index else fundData
         X_train, X_test, y_train, y_test, scaledX_forecast, forecastDay = \
             builder.build_train_test(pid, t_data, vixData, indexOtherData, cpiData, FDTRData, NAPMPMIData)