I'm trying to create a 2d rpg game that could be comparable to Realm of Mad God, but would be singleplayer only. I would like to use Pygame but I heard that 1.It's too slow, and 2)It would crash to often. So, which of these three languages is best.
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If you use hardware acceleration, which Pygame does have (check out the link below, CTRL+F "hardware acceleration", I din't guarantee it's pretty though), it shouldn't really matter.
The most efficient of those, however, would be C++. But even it won't save you from your code being inefficient.
A really good, OO and hardware accelerated multimedia library for C++ is SFML.