Install PIL on Mac OS

After installing PIL, when processing jpg, it prompts "decoder jpeg not available". It turns out that PIL installation does not provide support for jpeg.

First uninstall the installed PIL:

On Mac, you can find site-packages as follows:

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1. import django  
2. dir(django)  
3. print django.__path__  

After searching, mine is under /Library/Python/2.7/site-packages.

Enter the directory, delete the PIL directory and PIL.pth, and the installed PIL will be uninstalled.

Download libjpeg and zlib:

http://www.ijg.org/files/jpegsrc.v7.tar.gz

http://zlib.net/zlib-1.2.7.tar.gz

Install libjpeg:

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1. $ tar zxvf jpegsrc.v7.tar.gz   
2. $ cd jpeg-7  
3. $ ./configure --enable-shared --enable-static  
4. $ make  
5. $ sudo make install  

By default, it is installed under: /usr/local/lib.

Install zlib:

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1. $ tar zxvf zlib-1.2.7.tar.gz  
2. $ ./configure  
3. $ make  
4. $ sudo make install  

By default, it is installed under: /usr/local/lib.

Modify the setup.py of PIL:

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1. JPEG_ROOT = "/usr/local/include"  
2. ZLIB_ROOT = "/usr/local/include"  

Compile PIL:

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1. $ python setup.py build_ext -i  

test:

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1. $ python selftest.py  

If prompted:

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1. "57 tests passed."  

Then install:

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1. $ python setup.py install  

Installed.

zz http://blog.csdn.net/liushuaikobe/article/details/8729652