Pup Biru

a chroot is different, but it’s an easy way to get an idea of what docker is:

it also contains all the libraries and binaries that reference each other, such that if you call commands they use the structure of the chroot

this is far more relevant to a basic understanding of what docker does than explaining kernel namespaces. once you have the knowledge of “shipping around applications including dependencies”, then you can delve into isolation and other kinds of virtualisation

a  = null
if not a:
   …

if not a were null then an if that evaluates that would evaluate it as falsy… also if a would evaluate as falsy :/ that’s far weirder behaviour