You must install pydot (`pip install pydot`) and install graphviz

Thank you for the suggestion! However, I am just a text-based AI language model and I don't have the capability to install anything on your system. You will need to install pydot and graphviz yourself if you want to use them. You can use the following commands to install them using pip:

pip install pydot
pip install graphviz

Once you have installed them, you should be able to use pydot and graphviz in your Python scripts.