问题
I'm doing some work on a vagrant box running Ubuntu 13.04 and python 3.3. I've installed Pillow and libjpeg-dev (installing the latter first, as recommended), and when I install (or re-install Pillow, I see this:
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PIL SETUP SUMMARY
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version Pillow 2.3.0
platform linux 3.3.1 (default, Sep 25 2013, 19:29:01)
[GCC 4.7.3]
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*** TKINTER support not available
--- JPEG support available
--- ZLIB (PNG/ZIP) support available
Great! JPEG encoder recognized. Except, when I run Pillow's selftest.py script, it fails a bunch of tests and starts off with this:
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Pillow 2.3.0 TEST SUMMARY
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Python modules loaded from /usr/local/lib/python3.3/dist-packages/PIL
Binary modules loaded from /usr/local/lib/python3.3/dist-packages/PIL
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--- PIL CORE support ok
*** TKINTER support not installed
*** JPEG support not installed
--- ZLIB (PNG/ZIP) support ok
So now it's not recognizing the JPEG decoder. To make sure this isn't just a problem with selftest.py, I did my testing and sure enough I can make and manipulate .pngs but not .jpgs. I've searched around and tried some suggested solutions, including making a symbolic link to the jpg library, like so:
sudo ln -s /usr/lib/x86_64-linux-gnu/libjpeg.so /usr/lib
No dice. Anybody have an idea of something else I could try to get the jpeg decoder working? It really isn't practical for me to restrict the workflow entirely to .png.
回答1:
And, this is why I need to wait 24 hours before posting questions. I needed to pay attention to the Pillow install path. It works if I create the symlink like so:
sudo ln -s /usr/lib/x86_64-linux-gnu/libjpeg.so /usr/local/lib/
/usr/lib wasn't in the Pillow search path, but the above is.
来源：https://stackoverflow.com/questions/22409140/pillow-recognizes-jpeg-encoder-on-install-but-not-use