Code shown in the video: https://www.dropbox.com/s/mhtvh64qjy5qoe0/quine.py?dl=0 Gödel, Escher, Bach by Douglas R. Hofstadter: https://amzn.to/2C3NPiC
Right-click 'Download' and select 'Save Link As' if the file opens in a new tab.
