The Python version of "Software Design by Example" will be out Real Soon: you can read the content at <https://third-bit.com/sdxpy/> or order a hard copy at <https://www.routledge.com/9781032725215> - please use the code "SMA22" to get 20% off. All royalties will go to support the Red Door Family Shelter in Toronto (<https://www.reddoorshelter.ca/>).