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How to run Python libraries PIL and pillow in the Unreal Editor

I am currently attempting to run a Python file inside of the Unreal Editor's scripting environment that imports and uses the pillow (PIL fork) library's Image module:
from PIL import Image
However in the Unreal Editor's log I am getting the below error message when I try to run this script:
LogPython: Error: ModuleNotFoundError: No module named 'PIL'
I already have pillow installed on my computer, however the Unreal Editor doesn't seem to have it installed in it's internal Python package.
Is there any way I can execute or install pillow into the Unreal Editor?

I would be curious to see others approaches but I've found that adding Pythons site-packages path to the PYTHONPATH at Unreal Startup to be the ideal approach.
In the Unreal Python Settings (Edit > Project Settings > Search Python) you have the option to add a script that executes at start up. It's here we append any paths needed in our Pipeline.
import sys
if __name == '__main__':
sys.path.append("C:\\python37\\Lib\\site-packages")
Assuming you have PIL, or PySide2 or any other library pip installed then it should become available.

"Undefined variable from import" error when trying to use Image

I'm new to python and am not really sure how importing libraries works, but I understand that you are supposed to use "from PIL import Image" in order to import the Image module (is it even called a module???) and then use Image.open("filename") in order to open the Image, but I got a "No module named 'PIL'" error when I tried to import it from PIL. I then just did "import Image" which didn't raise any error flags but I still can't use Image.open without getting an "Undefined variable from import" error.
Any help is appreciated!

You need to install Pillow in order to use PIL
In your command line, type:
$ pip install Pillow
After that, you can use from PIL import Image

In Python, you may sometimes need to install a library before using it. To install a library goto command prompt and type this command:
pip3 install Pillow
you will see some stuff install and if you get no error message, you are good to go. Now rerun your program.

'ImportError: No module named pillow' in PyCharm

I'm getting an error while using PyCharm which doesn't allow me to import the pillow module even though I have it installed as a package in the project interpreter. Any help is greatly appreciated!
http://imgur.com/a/DfjC3

While the name of the package is pillow, it is a replacement for PIL and uses the PIL for the name of the base module
the usual way to use pillow is
from PIL import Image
im = Image.open("filename")
See the tutorial, and the documentation

You try to run code with default Python interpreter (/Library/Frameworks/Python.framework/Versions/3.2/bin/python3). You need to configure PyCharm to run Your code with anaconda (~/anaconda/bin/python)
And now (Like #JamesK say) read Pillow tutorial and documentation:
import PIL not import Pillow

For anybody still having trouble with this, I did the following which solved my problem.
Open up your Project Interpreter (⌘ + , on Mac).
At the bottom of this page you'll see the + symbol to the left of the anaconda logo. This will create a pop-up that allows you to search for available packages.
In this new window, search for 'Pillow'.
Click and Install Package.
You should now be able to use "from PIL import Image" or "import Pillow as pil" etc.

After running this command on your terminal
pip install pillow
and you are sure it was installed, but still having same problem of PIL module not found.
Go to your IDE and make sure existing interpreter is set to python interpreter and not anaconda

PIL Image data can not convert to float

I am working through a few Python image tutorials. It seems that the greatest challenge every time I try something new in Python is just getting it to work! I have imported the PIL code and am trying to run the short snippet below in Spyder on Python 2.7.8
from PIL import Image
from pylab import *
im = array(Image.open('test.jpg'))
imshow(im)
show()
When I do so, I get "Image data can not convert to float" error.
I tried to do the same in an iPython notebook and received the same error. When I run pip freeze it shows that I have PIP 1.1.7 installed. Of note, I installed PIP using the executable at the host site, not with PIP. I am also using the Spyder instance that comes with Anaconda.
Any advice?

After trying other solutions posted I discovered that PIL may be out of date with my newer Python build (see link in comments). Once Pillow was installed the issue was resolved.

Python PIL Image Module ImportError: No module named PIL, No module named Image

I've installed Python 2.7 alongside Python 2.4 as instructed here. When running a tests through Mac OSX Terminal connecting to the Server to confirm that the install is working I execute this test:
import Image
img = Image.open("/directory/image.jpg")
img.load()
print img
Result:
<PixelAccess object at 0x2b97d4c25110>
<JpegImagePlugin.JpegImageFile image mode=RGB size=75x75 at 0xFEF4050>
However, when executing this using PHP's exec() or through a Coda extension Run Script for Coda, I get the error:
ImportError: No module named Image
I've also tried from PIL import Image which does not make a difference. Something else to note is that when I check to make sure that the support is there I get this which indicates that the proper image support is available:
*** TKINTER support not available
--- JPEG support available
--- ZLIB (PNG/ZIP) support available
--- FREETYPE2 support available
*** LITTLECMS support not available
Question: Any ideas on how to fix this?

#stwhite I suggest you to use virtualenv (http://www.virtualenv.org/en/latest/index.html) for multiple projects to live in their own environments.
Usefull wrapper for virtualenv http://www.doughellmann.com/projects/virtualenvwrapper/
My own projects live in their own virtualenvs and its really awesome.
Here is the question about creating virtualenv with specific python version Use different Python version with virtualenv
Note
May be you'll have problems when installing PIL into the virtualenv
Solution
First install XCode with gcc support,
deactivate <virtualenv_name>
cd ../ (virtualenvs root)
pip install -E <virtualenv_name/> PIL
Hope this will work for you too,
Thanks,
Sultan

PHP is running the wrong version of Python. Specify the full path to the python executable.

Make sure your PYTHONPATH is correct when running via exec() call.
Import sys
print sys.path
sys.path.append ("<path of Image>")
You can also load the module dynamically, at runtime to ensure its available, provided its available in the standard location.