ubuntu1804报错‘Failed to import pydot. You must `pip install pydot` and install graphviz解决

ubuntu1804报错‘Failed to import pydot. You must pip install pydot and install graphviz解决

问题描述：
描绘网络结构图失败

tf.keras.utils.plot_model(model, show_shapes=True, to_file='YOLOV3Net.png')

报错：

Traceback (most recent call last):
  File "yolo_net.py", line 93, in <module>
    plot_model(model, show_shapes=True, to_file='YOLOV3Net.png')
  File "/home/zhao/anaconda3/lib/python3.8/site-packages/tensorflow/python/keras/utils/vis_utils.py", line 324, in plot_model
    dot = model_to_dot(
  File "/home/zhao/anaconda3/lib/python3.8/site-packages/tensorflow/python/keras/utils/vis_utils.py", line 116, in model_to_dot
    raise ImportError(message)
ImportError: ('Failed to import pydot. You must `pip install pydot` and install graphviz (https://graphviz.gitlab.io/download/), ', 'for `pydotprint` to work.')

安装需要的包

pip install pydot#安装1.4.1版本
pip install graphviz#安装0.16版本

此方法失败（原因可能是两个包版本不匹配）

解决方法

sudo apt-get install graphviz

此时很可能会显示依赖包没装

 graphviz : Depends: libann0 but it is not going to be installed
            Depends: libcdt5 but it is not going to be installed
            Depends: libcgraph6 but it is not going to be installed
            Depends: libgts-0.7-5 (>= 0.7.6) but it is not going to be installed
            Depends: libgvc6 but it is not going to be installed
            Depends: libgvpr2 but it is not going to be installed
            Depends: liblab-gamut1 but it is not going to be installed

装上就好了

sudo apt --fix-broken install

Ohhhhhh!!!