関連ワード:  python name plot is not defined    nameerror name plot is not defined    nameerror name graph is not defined    nameerror name summary is not defined    nameerror name 'plot_model' is not defined    nameerror name plot_function is not defined    nameerror name plot_predictions is not defined    nameerror name 'plot_histogram' is not defined    nameerror name plot_image is not defined    nameerror name plot_series is not defined