As far as I know "tuh-ple" is American programming jargon (Python jargon for sure), while everywhere else it's "too-ple", including American mathematics and European everything - programming and math. Correct me if I'm wrong.
I admit the distinction would be lost on anyone with an American accent anyway since "too" and "stew" rhyme in American English.
Honestly the only person I've known to say toople is, uh, me.