以下设置命令似乎正在运行（笔记本配置为运行Python 3）：
!pip3 install pydotplus
!pip3 install pydot
!apt-get -qq install -y graphviz && pip3 install -q pydot
!pip3 install pydot-ng
!pip3 install graphviz
!apt-get install python-pydot python-pydot-ng graphviz
import pydot
输出为：
Requirement already satisfied: pydotplus in /usr/local/lib/python3.6/dist-packages (2.0.2)
Requirement already satisfied: pyparsing>=2.0.1 in /usr/local/lib/python3.6/dist-packages (from pydotplus) (2.2.2)
Requirement already satisfied: pydot in /usr/local/lib/python3.6/dist-packages (1.2.4)
Requirement already satisfied: pyparsing>=2.1.4 in /usr/local/lib/python3.6/dist-packages (from pydot) (2.2.2)
Requirement already satisfied: pydot-ng in /usr/local/lib/python3.6/dist-packages (1.0.0)
Requirement already satisfied: pyparsing>=2.0.1 in /usr/local/lib/python3.6/dist-packages (from pydot-ng) (2.2.2)
Requirement already satisfied: graphviz in /usr/local/lib/python3.6/dist-packages (0.9)
Reading package lists... Done
Building dependency tree
Reading state information... Done
graphviz is already the newest version (2.40.1-2).
python-pydot is already the newest version (1.2.3-1).
python-pydot-ng is already the newest version (1.0.0-3).
0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.
但是当我尝试绘制编译模型时：
from keras.utils import plot_model
plot_model(model)
我得到：
---------------------------------------------------------------------------
ImportError Traceback (most recent call last)
<ipython-input-47-4cf84b52a91d> in <module>()
9
10 from keras.utils import plot_model
---> 11 plot_model(model)
/usr/local/lib/python3.6/dist-packages/keras/utils/vis_utils.py in plot_model(model, to_file, show_shapes, show_layer_names, rankdir)
132 'LR' creates a horizontal plot.
133 """
--> 134 dot = model_to_dot(model, show_shapes, show_layer_names, rankdir)
135 _, extension = os.path.splitext(to_file)
136 if not extension:
/usr/local/lib/python3.6/dist-packages/keras/utils/vis_utils.py in model_to_dot(model, show_shapes, show_layer_names, rankdir)
53 from ..models import Sequential
54
---> 55 _check_pydot()
56 dot = pydot.Dot()
57 dot.set('rankdir', rankdir)
/usr/local/lib/python3.6/dist-packages/keras/utils/vis_utils.py in _check_pydot()
18 if pydot is None:
19 raise ImportError(
---> 20 'Failed to import `pydot`. '
21 'Please install `pydot`. '
22 'For example with `pip install pydot`.')
ImportError: Failed to import `pydot`. Please install `pydot`. For example with `pip install pydot`.
---------------------------------------------------------------------------
NOTE: If your import is failing due to a missing package, you can
manually install dependencies using either !pip or !apt.
To view examples of installing some common dependencies, click the
"Open Examples" button below.
---------------------------------------------------------------------------
不确定丢失了什么。