[3.14] gh-134160: Use multi-phase init in documentation examples (GH-134296) (#134753)

gh-134160: Use multi-phase init in documentation examples (GH-134296)
(cherry picked from commit 96905bdd273d2e5724d2c1b6b0f95ecb0daeaabe)

Co-authored-by: neonene <53406459+neonene@users.noreply.github.com>
Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>