No module named 'Pillow'

[snippsat]

I have re-installed python and confirm I have a PYTHONPATH environment variable containing the paths to the installed python DLLs and Lib folders.

Look as this to make sure all is correct Python 3.6/3.7 and pip installation under Windows

A basic test of python and pip from command line.

C:\>python -V
Python 3.7.3

C:\>python -c "import sys; print(sys.executable)"
C:\python37\python.exe

# See that pip point to 3.7
C:\>pip -V
pip 19.1.1 from c:\python37\lib\site-packages\pip (python 3.7)

So now will pip install Pillow only install to Python 3.7.
A quick test i use virtual environment as a already have Pillow installed before.

# Install 
(key_env) E:\div_code\key_env
λ pip install Pillow
Collecting Pillow .....
Installing collected packages: Pillow
Successfully installed Pillow-6.0.0

# Test
(key_env) E:\div_code\key_env
λ python
Python 3.7.3 (v3.7.3:ef4ec6ed12, Mar 25 2019, 21:26:53) [MSC v.1916 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
# The import is still PIL as mention before
>>> from PIL import Image
>>> Image.__version__
'6.0.0'

>>> im = Image.open("22.jpg")
>>> print(im.format, im.size, im.mode)
JPEG (930, 288) RGB
>>> exit()