P*rl in Latin, whither Python?

[Steve Williams]

Andrew Kuchling wrote:

> With me it's which/that; no one has ever explained the precise rules
> between them, yet I'm always  .  "Python, that has been developed since
> 1989, is a ..."  vs. "Python, which has been...".
>
> --amk

To paraphrase Rudolph Fleisch:  "Removing 'which' and 'that' will improve any
English sentence."

Python, under development since 1989, is a . . .