Failed to import pydot. You must install pydot and graphviz for `pydotprint` to work

Failed to import pydot. You must install pydot and graphviz for pydotprint to work

解决方法安装graphviz和pydot

sudo add-apt-repository ppa:gviz-adm/graphviz-dev
sudo apt-get update
sudo apt-get install graphviz-dev

pip install pydot
pip install graphviz