ImageData' object has no attribute 'data'

[dp6000]

I ran the colab tutorial, '1_dqn_tutorial.ipynb' without making any changes. When running the code,

env.reset()
PIL.Image.fromarray(env.render())

The following error is reported:

AttributeErrorTraceback (most recent call last)
in ()
1 env.reset()
----> 2 PIL.Image.fromarray(env.render())

3 frames
/usr/local/lib/python2.7/dist-packages/gym/envs/classic_control/rendering.pyc in render(self, return_rgb_array)
94 buffer = pyglet.image.get_buffer_manager().get_color_buffer()
95 image_data = buffer.get_image_data()
---> 96 arr = np.fromstring(image_data.data, dtype=np.uint8, sep='')
AttributeErrorTraceback (most recent call last)
in ()
1 env.reset()
----> 2 PIL.Image.fromarray(env.render())

3 frames
/usr/local/lib/python2.7/dist-packages/gym/envs/classic_control/rendering.pyc in render(self, return_rgb_array)
94 buffer = pyglet.image.get_buffer_manager().get_color_buffer()
95 image_data = buffer.get_image_data()
---> 96 arr = np.fromstring(image_data.data, dtype=np.uint8, sep='')
97 # In openai/gym-http-api#2, we
98 # discovered that someone using Xmonad on Arch was having

AttributeError: 'ImageData' object has no attribute 'data'

[kuanghuei]

It looks like a recent release of pyglet breaks gym. I downgraded pyglet to 1.3.2 for the colabs, and it should work now.

Thanks.