$ pip install pygame
Collecting pygame
  Downloading https://files.pythonhosted.org/packages/b9/89/aca02f8771727c2713c11a39c1cc295e4deb60be322be19ad7460570f978/pygame-1.9.4-cp37-cp37m-macosx_10_11_intel.whl (4.9MB)
    100% |████████████████████████████████| 4.9MB 6.4MB/s
Installing collected packages: pygame
Successfully installed pygame-1.9.4

$ python -m pygame.examples.aliens
pygame 1.9.4
Hello from the pygame community. https://www.pygame.org/contribute.html