Why Python is not popular for Game Development?

Answer 1

Game development needs performance. There are much faster languages than python. Probably, the most used language in game development is C++.

Answer 2

But python still have a good librairies for game developpment as pygame

Answer 3

For games C++ can be even hundreds times faster than Python.
https://benchmarksgame.alioth.debian.org/u64q/compare.php?lang=python3&lang2=gpp