occult

train_test_features['YearsSinceBuilt'] = train_test_features['YrSold'].astype(int) - train_test_features['YearBuilt'].astype(int)
train_test_features['YearsSinceRemod'] = train_test_features['YrSold'].astype(int) - train_test_features['YearRemodAdd'].astype(int)

train_test_features['TotalWalledArea'] = train_test_features['TotalBsmtSF'] + train_test_features['GrLivArea']
train_test_features['TotalPorchArea'] = train_test_features['OpenPorchSF'] + train_test_features['3SsnPorch'] + train_test_features['EnclosedPorch'] + train_test_features['ScreenPorch'] + train_test_features['WoodDeckSF']
train_test_features['TotalOccupiedArea'] = train_test_features['TotalWalledArea'] + train_test_features['TotalPorchArea']

train_test_features['OtherRooms'] = train_test_features['TotRmsAbvGrd'] - train_test_features['BedroomAbvGr'] - train_test_features['KitchenAbvGr']
train_test_features['TotalBathrooms'] = train_test_features['FullBath'] + (0.5 * train_test_features['HalfBath']) + train_test_features['BsmtFullBath'] + (0