Pillow 已安装，但仍然收到“ImportError: No module named PIL”

Question

I did find this question asked by few more people, but none of those exactly met my situation, so asking here myself. I've (rather had) two versions of Python (2.7 and 3.4.3) on my Mac running the latest MacOS High Sierra. As I understand, the v2.7 comes as default installation with the MacOS. And I installed the 3.4.3 (from .dmg file downloaded from the python site). Thus now, the python command defaults to the 2.7, while python3 points to the 3.4.3 in the terminal. While trying to learn, I tried a python script that uses

import PIL and from PIL import Image

But when running, this gave the error ImportError: No module named PIL . Upon research on google, I figured out to install PIL and Pillow using

sudo pip install Pillow

It installed correctly, but I'm still getting the same error. To remove the confusion, I decided to remove the python 3.4.3 from the system. But even after it's removed, I still get the same error. Even pip list displays Pillow 5.1.0 alright. So right now, I've only Python 2.7, and the error persists, while Pillow is also in there.

which python gives /opt/local/bin/python as the path.

Does any of the above ring a bell? Any ideas, what else could be missing here?

Answer 1

Phew, finally found the issue. Thanks @Yash for the pointers. Incidentally I did a which -a python and surprisingly got this output:

/opt/local/bin/python
/usr/bin/python

Damn, I don't remember when I installed a second 2.7 version on the /opt/local/bin folder (probably via macports). Alright, removed the confusion, deleted this python, so now I'm left only with the system installed python at /usr/bin . And now the imports all run perfectly fine as expected. :-)

Answer 2

Try this,

sudo pip install image

I hope it works! One more thing, do check if you're running python3 filename.py instead of python filename.py, if you want to install it for Python 3, run the command,

sudo pip3 install Pillow

Answer 3

Basic Installation:

pip install Pillow

Windows Installation:

pip install Pillow

Reference: https://pillow.readthedocs.io/en/stable/installation.html

Answer 4

Try this. It worked for me

pip install --upgrade --force-reinstall pillow

If you get something like access denied error run the below command

pip install --upgrade --force-reinstall pillow --user