ModuleNotFoundError: No module named cStringIO

[mha90]

I installed haul using pip:
pip install haul

I was using the first find_images example and got the following error
File "~\Python36-32\lib\site-packages\haul\utils.py", line 3, in import cStringIO
ModuleNotFoundError: No module named 'cStringIO'

[m-spangenberg]

I just stumbled across the same issue - it seems to be changes since in Python 3 removing StringIO and cStringIO modules and replacing them with io.StringIO and io.BytesIO. @vinta - haul/utils.py needs some small changes to reflect the removal of cStringIO.