Are you paraphrasing ESR paraphrasing Greenspun's Tenth Rule of Programming?
"Any sufficiently complicated C or Fortran program contains an ad-hoc, informally-specified bug-ridden slow implementation of half of Common Lisp."
Ref: http://philip.greenspun.com/research/
P.S. This is not a comment on TFA. Congratulations to the author on making Python even more interactive.