> You would not get through code review with that in any shop that has discipline.

... and i'd never think to try! that's why i mentioned using it in a REPL and called it a hack :) it's just fun. i played around with bytecode-rewriting too, doesn't mean i'd use it in production.

PS. for a less extreme version, the 1-elem-tuple trick is useful if you need an intermediate variable in a listcomp:

  [
    y+y
    for x in my_list
    for y in (foo(x),)
  ]

but it's (obviously) ugly & only useful if you're in a REPL and don't want to rewrite the whole thing.