我对开发比较陌生，我一直在尝试设置我在 Django 中构建的应用程序（在 Windows 7、64 位上）以接受通过 ImageField 上传的图像。我最初安装了 PIL，但发现我首先需要 JPEG 和 PNG 库。所以我使用“pip uninstall pil”卸载了 PIL，并将库设置在 C:\zlib-1.2.7\zlib.lib 和 C:\jpeg-8d\libjpeg.lib。之后，我进入了 PIL 中的 setup.py 并更改了以下内容：
JPEG_ROOT = "C:/jpeg-8d"
ZLIB_ROOT = "C:/zlib-1.2.7"
然后我通过以下方式安装：
pip install C:\Imaging-1.1.7\
我在安装结束时得到以下信息，这表明支持 JPEG 和 PNG：
Installing collected packages: PIL
Running setup.py install for PIL
WARNING: '' not a valid package name; please use only.-separated package nam
es in setup.py
--------------------------------------------------------------------
PIL 1.1.7 SETUP SUMMARY
--------------------------------------------------------------------
version 1.1.7
platform win32 2.6.6 (r266:84297, Aug 24 2010, 18:46:32)
[MSC v.1500 32 bit (Intel)]
--------------------------------------------------------------------
*** TKINTER support not available (Tcl/Tk 8.5 libraries needed)
--- JPEG support available
--- ZLIB (PNG/ZIP) support available
*** FREETYPE2 support not available
*** LITTLECMS support not available
--------------------------------------------------------------------
To add a missing option, make sure you have the required
library, and set the corresponding ROOT variable in the
setup.py script.
To check the build, run the selftest.py script.
Successfully installed PIL
Cleaning up...
但是，我在使用 selftest.py 进行测试时得到了关注，这表明不支持：
C:\Windows\system32>python C:\Imaging-1.1.7\selftest.py
--------------------------------------------------------------------
PIL 1.1.7 TEST SUMMARY
--------------------------------------------------------------------
Python modules loaded from C:\Users\ayan\Desktop\Imaging-1.1.7\PIL
Binary modules loaded from C:\Python26_x86\lib\site-packages\PIL
--------------------------------------------------------------------
*** PIL CORE support not installed
*** TKINTER support not installed
*** JPEG support not installed
*** ZLIB (PNG/ZIP) support not installed
*** FREETYPE2 support not installed
*** LITTLECMS support not installed
--------------------------------------------------------------------
我还尝试使用 JPEG 并得到以下 IOError：
C:\Users\Public\Pictures\Sample Pictures>python
Python 2.6.6 (r266:84297, Aug 24 2010, 18:46:32) [MSC v.1500 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import PIL
>>> import os, sys
>>> import Image
>>> img = Image.open(Desert.jpg)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
NameError: name 'Desert' is not defined
>>> img = Image.open("Desert.jpg")
>>> img.save("Desert_test.jpg")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Python26_x86\lib\site-packages\PIL\Image.py", line 1406, in save
self.load()
File "C:\Python26_x86\lib\site-packages\PIL\ImageFile.py", line 189, in load
d = Image._getdecoder(self.mode, d, a, self.decoderconfig)
File "C:\Python26_x86\lib\site-packages\PIL\Image.py", line 385, in _getdecode
r
raise IOError("decoder %s not available" % decoder_name)
IOError: decoder jpeg not available
这有点类似于https://stackoverflow.com/questions/10543581/pil-installation-run-issue报告的内容；但是，在这种情况下，JPEG 似乎实际上不起作用。使用 PNG 观察到类似的问题。
我不清楚在这个过程中我在哪里犯了错误，所以任何评论都将不胜感激。如果需要其他信息，请告诉我，我会尽力提供。
非常感谢。