[docs] [issue30361] Docs example: converting mixed types to floating point

Mariatta Wijaya added the comment: Sorry, I don't know whether this was a sprint project or not.] Saw that the original PR has sprint label on it, I merely copied them over to the backport PRs. Thanks. ---------- _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue30361> _______________________________________