Trying to run simple PIL python example, can't convert jpeg to float

Question

so I wrote a simple python script

from PIL import Image
from pylab import *
im = array(Image.open(\'sample.jpg\'))
imshow(im)

and i get this er

Answer 1

I know this is coming very later but I thought I should answer just in case anyone else had the same problem. I ran into the same problem and the issue was the image I loaded did not exist in the project folder.so you need to check that sample.jpg exist and that it loads properly before using it.

if os.path.isfile('sample.jpg'): im = array(Image.open('sample.jpg'))
if im == None or im.size == 0: 
   print 'Image loaded is empty'
   sys.exit(1)