// 3.generate input data for model
train, test = train_test_split(data, test_size=0.2)
train_model_input = [train[feat].values for feat in sparse_feature_dict] + \
[train[feat].values for feat in dense_feature_list]
test_model_input = [test[feat].values for feat in sparse_feature_dict] + \
[test[feat].values for feat in dense_feature_list]