1 import sys 2    3 from _winreg import * 4    5 # tweak as necessary 6 version = sys.version[:3] 7 installpath = sys.prefix 8 regpath = "SOFTWARE\Python\Pythoncore\%s\\" % (version) 9 installkey = "InstallPath"10 pythonkey = "PythonPath"11 pythonpath = "%s;%s\Lib\;%s\DLLs\\" % (12     installpath, installpath, installpath13 )14  15 def RegisterPy():16     try:17         reg = OpenKey(HKEY_CURRENT_USER, regpath)18     except EnvironmentError as e:19         try:20             reg = CreateKey(HKEY_CURRENT_USER, regpath)21             SetValue(reg, installkey, REG_SZ, installpath)22             SetValue(reg, pythonkey, REG_SZ, pythonpath)23             CloseKey(reg)24         except:25             print "*** Unable to register!"26             return27         print "--- Python", version, "is now registered!"28         return29     if (QueryValue(reg, installkey) == installpath and30         QueryValue(reg, pythonkey) == pythonpath):31         CloseKey(reg)32         print "=== Python", version, "is already registered!"33         return34     CloseKey(reg)35     print "*** Unable to register!"36     print "*** You probably have another Python installation!"37 RegisterPy()

 将以上代码运行一下注册一下现有的路径即可安装PIL了

PIL下载地址：http://pythonware.com/products/pil/