NameError: global name 'EventLoop' is not defined - pyglet

I am trying to have python play an audio file for me. I am writing my code in enthought canopy.

import pyglet

sound = pyglet.media.load('song.wav')
sound.play()
pyglet.app.run()

When I run this I get an error: NameError: global name 'EventLoop' is not defined Also, the audio file plays the first note before the program errors.

I have no idea what is going on.

p.s. Do I need the pylab backend to be interactive for pyglet?

OS - osx 10.12.1 pyglet version 1.1.4-3

Traceback

NameError                                 Traceback (most recent call last)
/Users/name/Documents/name/Arduino Projects/python/Audio Testing.py in <module>()
      3 sound = pyglet.media.load('s.wav')
      4 sound.play()
----> 5 pyglet.app.run()

/Users/name/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/pyglet/app/__init__.pyc in run()
    262 
    263     '''
--> 264     EventLoop().run()
    265 
    266 def exit():

NameError: global name 'EventLoop' is not defined