i meet a new issue that i can not run it.

[iceorfire]

2016-12-03 15:39:16.578 Python[10293:65253] 15:39:16.578 WARNING: 140: This application, or a library it uses, is using the deprecated Carbon Component Manager for hosting Audio Units. Support for this will be removed in a future release. Also, this makes the host incompatible with version 3 audio units. Please transition to the API's in AudioComponent.h.
Traceback (most recent call last):
File "deep_q_network.py", line 8, in
import wrapped_flappy_bird as game
File "game/wrapped_flappy_bird.py", line 19, in
IMAGES, SOUNDS, HITMASKS = flappy_bird_utils.load()
File "game/flappy_bird_utils.py", line 21, in load
pygame.image.load('assets/sprites/0.png').convert_alpha(),
pygame.error: Failed loading libpng.dylib: dlopen(libpng.dylib, 2): image not found