The SICP Python

Where did the SICP Python originate?
The meme seems to have been here forever but i've never seen it's first post.
Why a python? Is it something to do with your tsundere relationship to the Python language?

>>1
That snake originates from a shoop of a character from kodomo no jikan. She raises her hand to ask a question, and the hand is shooped to be that prog snake.

Also don't click on the link above me. It's nimp.org