It would probably be a good idea to store the paths to source-files centralized in a seperate module, so it's easy to move the images around while the project grows...
Example:
# Images:
IMG_ANI_walk_r = "images\\ANI_walk_r.png"
# Sound:
SND_shoot_fireball = "sound\\tmp\\shoot_sound.wav"
It would probably be a good idea to store the paths to source-files centralized in a seperate module, so it's easy to move the images around while the project grows...
Example: