Develop Reference

Upgrading pillow from version 8.3.2-> 9.1.1

I am upgrading pillow from version 8.3.2 to 9.1.1.
A little confused by the release notes. version 9.0.0 and above are built against libjpeg-turbo.
Does it mean we must have libjpeg-turbo installed on our servers as well?
or is it fine to stick with libjpeg-dev package we have.

The binary wheels for Pillow are statically compiled against the basic format libraries, as evident from compiled for libjpeg-turbo 2.1.3 being present in the slimmest Python container:
~ $ docker run -it python:3.10-slim-bullseye bash
root#4fb371115880:/# pip install -q Pillow
root#4fb371115880:/# python -c 'from PIL.features import pilinfo; pilinfo()'
--------------------------------------------------------------------
Pillow 9.1.1
Python 3.10.5 (main, Jun 7 2022, 18:49:47) [GCC 10.2.1 20210110]
--------------------------------------------------------------------
Python modules loaded from /usr/local/lib/python3.10/site-packages/PIL
Binary modules loaded from /usr/local/lib/python3.10/site-packages/PIL
--------------------------------------------------------------------
--- PIL CORE support ok, compiled for 9.1.1
*** TKINTER support not installed
--- FREETYPE2 support ok, loaded 2.12.1
--- LITTLECMS2 support ok, loaded 2.13.1
--- WEBP support ok, loaded 1.2.2
--- WEBP Transparency support ok
--- WEBPMUX support ok
--- WEBP Animation support ok
--- JPEG support ok, compiled for libjpeg-turbo 2.1.3
--- OPENJPEG (JPEG2000) support ok, loaded 2.5.0
--- ZLIB (PNG/ZIP) support ok, loaded 1.2.11
--- LIBTIFF support ok, loaded 4.3.0
*** RAQM (Bidirectional Text) support not installed
*** LIBIMAGEQUANT (Quantization method) support not installed
--- XCB (X protocol) support ok
In other words, no, you don't need to install libjpeg-turbo (or libjpeg, even) separately if you don't compile Pillow yourself.

Installing pillow on windows fails to find libjpeg

Sys: Windows 7 Prof;
Python v3.3
I've tried to use:
'easy_install Pillow'
'pip install use-wheel Pillow'
Download package manually and 'python setup.py install'
but all the time i cant install any extensions:
*** TKINTER support not available
(Tcl/Tk 8.5 libraries needed)
*** JPEG not support available
*** ZLIB (PNG/ZIP) support not available
*** TIFF G3/G4 (experimental) support not available
*** FREETYPE2 support not available
*** LITTLECMS support not available
*** WEBP support not available
I've manually installed libjpeg but still the results were the same. I've alsot tried to change JPEG_ROOT path to point it somehow to the correct dll but it did not work too.
Any idea how to solve this?

try python extension packages for windows：
http://www.lfd.uci.edu/~gohlke/pythonlibs/
There are 32- and 64-bit Windows binaries you can simply install

PIL / Easy Thumbnails Missing Dependencies Django

I ported a web application to another machine, but am having a problem getting django easy thumbnails setup on another team member's machine (mac osx 10.6 snow leopard). I know it requires PIL, but am having problems getting it and perhaps its dependencies set up on the machine.
I read this post detailing how to install libjpeg on a mac, but still did not have luck. Afterwards, I tried to uninstall PIL and instead use Pillow, but still does not work:
(newenv)wsp049614wss:site-packages Admin$ pip uninstall pil
Successfully uninstalled PIL
(newenv)wsp049614wss:site-packages Admin$ pip install pillow
Downloading/unpacking pillow
Downloading Pillow-2.2.1.zip (2.2MB): 2.2MB downloaded
Running setup.py egg_info for package pillow
--------------------------------------------------------------------
PIL SETUP SUMMARY
--------------------------------------------------------------------
version Pillow 2.2.1
platform darwin 2.7.5 (default, Oct 27 2013, 12:25:46)
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)]
--------------------------------------------------------------------
--- TKINTER support available
--- JPEG support available
--- ZLIB (PNG/ZIP) support available
*** TIFF G3/G4 (experimental) support not available
--- FREETYPE2 support available
*** LITTLECMS support not available
*** WEBP support not available
*** WEBPMUX support not available
--------------------------------------------------------------------
What am I missing? How can I get easy_thumbnails to work? I did not change anything in the codebase, and easy-thumbnails works on other machines. Thanks for any ideas!

Oh no - you have the dreaded libjpeg Snow leopard issue. Basically your standard pip install of PIL doesn't work, it messes up the libjpeg C lib. There are a million blogs on this issue, this one worked for me, but you'll have to hunt around trying out various fixes.

PNG display in PIL broken on OS X Mavericks?

I've noticed that PNG images aren't displaying in Tkinter apps using ImageTk.PhotoImage in OS X Mavericks. But, GIFs and JPEGs display fine. There's no error printed or exception thrown and debugging the code shows the image is read and has the correct height & width. Here's a simplified example:
import Tkinter
from PIL import Image, ImageTk
logo_file = 'test.png'
#logo_file = 'test.gif'
class Application(Tkinter.Frame):
def __init__(self, master):
Tkinter.Frame.__init__(self, master)
self.master.minsize(width=512, height=256)
self.master.config()
self.pack()
self.main_frame = Tkinter.Frame()
self.some_image = ImageTk.PhotoImage(Image.open(logo_file))
some_label = Tkinter.Label(self.main_frame, image=self.some_image)
some_label.config()
some_label.pack(side='top')
self.main_frame.place(in_=self.master, anchor='c', relx=.5, rely=.5)
root = Tkinter.Tk()
app = Application(root)
app.mainloop()
If you use a GIF the image will be displayed, but using a PNG it will not. Again, this is only happening on OS X Mavericks, Mountain Lion works fine. I've tried re-installing (compiling PIL) with no luck, as well as trying a new virtualenv.
Is there perhaps some PNG attribute I need to set correctly when creating/saving the PNG? Or is this a bug in PIL or Tkinter or OS X?
Update to add some details
I'm using:
Python 2.7.5 (/usr/bin/python)
PIL 1.1.7 (compiled using pip)
This is on a machine that was just updated to Mavericks from Mountain Lion, and previously had PIL installed, and I haven't messed with the system Python shipped by Apple.
Update 2 Pillow setup summary
I installed Pillow 2.2.1 and it says it has PNG support:
--------------------------------------------------------------------
PIL SETUP SUMMARY
--------------------------------------------------------------------
version Pillow 2.2.1
platform darwin 2.7.5 (default, Aug 25 2013, 00:04:04)
[GCC 4.2.1 Compatible Apple LLVM 5.0 (clang-500.0.68)]
--------------------------------------------------------------------
--- TKINTER support available
--- JPEG support available
--- ZLIB (PNG/ZIP) support available
--- TIFF G3/G4 (experimental) support available
--- FREETYPE2 support available
*** LITTLECMS support not available
*** WEBP support not available
*** WEBPMUX support not available
--------------------------------------------------------------------
I also uninstalled and re-installed libpng using brew (libpng 1.5.14). I then re-installed Pillow to make sure it built with it, though I think it uses zlib.
Update 3 trying to build Python 2.7.5
Perhaps the issue is with zlib, trying to compile Python 2.7.5 I get this:
Python build finished, but the necessary bits to build these modules were not found:
_bsddb _sqlite3 _ssl
bsddb185 dbm dl
gdbm imageop linuxaudiodev
nis ossaudiodev readline
spwd sunaudiodev zlib
To find the necessary bits, look in setup.py in detect_modules() for the module's name.
Failed to build these modules:
_tkinter

I think your problem is that your PIL was built without PNG support, or with only partial PNG support, on your Mavericks machine.
If PIL can't find both libpng and libz where it wants to, you won't have complete PNG support. And after upgrading from Mountain Lion to Mavericks, this seems to sometimes be a problem.
This may not be the same problem you're having. For example, it could be down to Apple using a buggy version of Tcl/Tk again (as they infamously did in Snow Leopard). But it's definitely worth trying.
With Pillow, and some versions of old-school PIL (but really, if you're not using Pillow, you almost definitely should be), the end of the install process gives you a friendly "PIL SETUP SUMMARY" section that shows you all the important configuration stuff.
I had the exact same problem with Pillow 2.2.1 on a locally-built Python 3.3.2. I solved it by using Homebrew to install libpng, then rebuilding Pillow:
$ brew install libpng
$ pip-3.3 uninstall pillow
$ pip-3.3 install pillow

I was experiencing the same problem and I did the following. It seems to be fixed.
sudo unistall pillow
xcode-select --install
pip install pillow
It seems to be working great. I also installed all the items below, but it seems you have it already installed
brew install libtiff libjpeg libpng webp littlecms

Did you install Pillow dependencies?
pip uninstall Pillow
brew install libtiff libjpeg webp littlecms
pip install Pillow
You will need HomeBrew to execute the brew command.

I installed Pillow from homebrew (brew install Pillow), all necessary dependencies will be installed automatically. Problem solved.

PIL: selftest fails, but package shows status is fine?

I have PIL installed with the required libraries (so I think). During installation it shows
*** TKINTER support not available
--- JPEG support available
--- ZLIB (PNG/ZIP) support available
--- FREETYPE2 support available
--- LITTLECMS support available
However, when I run selftest.py, I get this:
*** PIL CORE support not installed
*** TKINTER support not installed
--- JPEG support ok
--- ZLIB (PNG/ZIP) support ok
*** FREETYPE2 support not installed
*** LITTLECMS support not installed
i.e. it's not detecting PIL CORE, FREETYPE2 and LITTLECMS.
I installed the following packages on CentOS 6.0 using python 2.6.5
libjpeg libjpeg-devel zlib zlib-devel freetype freetype-devel lcms lcms-devel
PIL was installed with pip install PIL. However, the selftest was run from a source code from the offical PIL website.
Any ideas?

Try building the C extensions in-place in the source directory with setup.py build_ext -i before running selftest.py or Tests\run.py.