At the end of lesson 4, Patrick demo-ed how we can deploy our smart contract with ganache-cli. As of today, ganache-cli's last update was 3 years ago and the package has been deprecated. So, when you run deploy.py, you'll probably run into the error of "Method eth_feeHistory not supported". What you need to do is to remove ganache-cli and install ganache instead. The rest is the same and you should run deploy.py successfully.
Good luck.