安装了枕头，但仍收到“ ImportError：无名为PIL的模块”

Question

Pillow was working fine for me and then I got this error :

File "/usr/local/lib/python2.7/site-packages/PIL/Image.py", line 2452, in open  
    % (filename if filename else fp))  
IOError: cannot identify image file 'dataSet/.DS_Store'

From answers on SO I got that it is possible I have both PIL and pillow installed and so I uninstalled PIL and installed pillow using easy_install and ever since then I keep getting this error.

ImportError: No module named PIL

I tried everything.

pip install image  
pip install pillow  
pip upgrade pip  
import PIL from Image  

pip --version gives : pip 9.0.1 from /usr/local/lib/python2.7/site-packages (python 2.7)
pip freeze | grep Pillow pip freeze | grep Pillow gives : Pillow==4.1.0

The code I'm running is:

import os
import cv2
import numpy as np 
from PIL import Image

And at line 4 I keep getting the error

Traceback (most recent call last):  
  File "finder.py", line 4, in <module>  
    from PIL import Image  
ImportError: No module named PIL

What else can I do to fix the situation? Did I read all the posts related to this topic on SO? Pretty much. And there are MANY posts related to it as well,but please,help me.

Answer 1

It seems that You have Installed Pillow for python3.* pip install pillow Install the right version for python2.7 from here https://pypi.python.org/pypi/Pillow/4.0.0

python2.7 version has cp27 in it's name, download the right wheel file based on your system architecture. pip install some-package.whl I hope it helps.

Answer 2

Regarding the first error, this is an expected error:

File "/usr/local/lib/python2.7/site-packages/PIL/Image.py", line 2452, in open
% (filename if filename else fp))
IOError: cannot identify image file 'dataSet/.DS_Store'

You're trying to open a non-image with Pillow, and it's responding by saying it cannot open it. This is correct behaviour.

I guess you're trying to open all the images in a directory, but it's failing on .DS_Store , which aa metadata file created by macOS when viewing the contents of the directory. This file won't have existed before you looked in the directory with Finder, hence the code worked. What you need to do is either ignore this file (as you would with Thumbs.db on Windows), be more careful with globbing (eg. make sure only .jpg or .png or such) or handle the IOError with a try: / except IOError: block.