Hi, I developed the linked resource earlier in the year and started writing some code examples using python-buidl and python-bitcoinlib. I didn't have much time to write more examples in the past weeks but am hopeful to produce some new content soon(ish). Also we website is open source so feel free to correct any of my mistakes or even write some new examples! :)

Website's code: https://github.com/i0x0ff/bitcoinpy-www/