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[Mekire]

If I did want to write games, is PyGame sufficient?

Really, really depends what you want to make.
I've honestly lost faith in pygame as a serious tool though it is fun to make simple games.

When there are literally engines with millions of dollars behind them available for free (Unity, CryEngine) using pygame is more of a fetish than anything else. It will take you an insane amount of effort to even come close to things you would get practically out of the box with other tools.