其他人有這個問題，我用了他們的解決方案但沒有解決。我用virtual env with python3.5. Matplotlib安裝在virtual env. 我在系統上安裝了 python3.tkinter。當我檢查matplotlib.get_backend()我有>>> import matplotlib>>> matplotlib.get_backend()'TkAgg'但是當我運行下面的代碼時for image_path in TEST_IMAGE_PATHS:  image = Image.open(image_path)  # the array based representation of the image will be used later in order to prepare the  # result image with boxes and labels on it.  image_np = load_image_into_numpy_array(image)  # Expand dimensions since the model expects images to have shape: [1, None, None, 3]  image_np_expanded = np.expand_dims(image_np, axis=0)  # Actual detection.  output_dict = run_inference_for_single_image(image_np, detection_graph)  # Visualization of the results of a detection.  vis_util.visualize_boxes_and_labels_on_image_array(      image_np,      output_dict['detection_boxes'],      output_dict['detection_classes'],      output_dict['detection_scores'],      category_index,      instance_masks=output_dict.get('detection_masks'),      use_normalized_coordinates=True,      line_thickness=8)  #plt.figure(figsize=IMAGE_SIZE)  plt.imshow(image_np)  plt.show()我有問題 UserWarning: Matplotlib is currently using agg, which is a non-GUI backend, so cannot show the figure.  % get_backend())我把標題放在from io import StringIOimport matplotlibmatplotlib.rcParams["backend"] = "TkAgg"from matplotlib import pyplot as pltfrom PIL import Image有人說已經解決了，但我還是有同樣的問題，plt不顯示圖像。