Opening Presentation with python pptx

i got some code on python to open pptx files with LibreOffice

from pptx import Presentation

prs = Presentation('tes.pptx')

if i run this code on Raspbian, i got this error message

File "bukappt.pt", line 1, in <module>
 from pptx import Presentation
File "/usr/local/lib/python2.7/dist-packages/pptx/_init_.py", line 15, in <module>
 from pptx.api import Presentation # noqa
File "/user/local/lib/python2.7/dist-packages/pptx/api.py", line 14, in <module>
 from ppx.package import Package
File "/usr/local/lib/python2.7/dist-packages/pptx/parts/image.py", line 13, in <module>
  import Image as PIL_Image
ImportError: No modulenamed Image

how could i fix this?