安装setuptools的时候，不能再注册表中识别出来python2.7
在网上找了方法，仅作笔记，供下次使用
方法：
新建一个register.py 文件，把一下代码贴进去，保存（G盘）
## script to register Python 2.0 or later for use with win32all# and other extensions that require Python registry settings## written by Joakim Loew for Secret Labs AB / PythonWare## source:# http://www.pythonware.com/products/works/articles/regpy20.htm## modified by Valentine Gogichashvili as described in http://www.mail-archive.com/distutils-sig@python.org/msg10512.html import sys from _winreg import * # tweak as necessaryversion = sys.version[:3]installpath = sys.prefix regpath = "SOFTWARE\\Python\\Pythoncore\\%s\\" % (version)installkey = "InstallPath"pythonkey = "PythonPath"pythonpath = "%s;%s\\Lib\\;%s\\DLLs\\" % ( installpath, installpath, installpath) def RegisterPy(): try: reg = OpenKey(HKEY_CURRENT_USER, regpath) except EnvironmentError as e: try: reg = CreateKey(HKEY_CURRENT_USER, regpath) SetValue(reg, installkey, REG_SZ, installpath) SetValue(reg, pythonkey, REG_SZ, pythonpath) CloseKey(reg) except: print "*** Unable to register!" return print "--- Python", version, "is now registered!" return if (QueryValue(reg, installkey) == installpath and QueryValue(reg, pythonkey) == pythonpath): CloseKey(reg) print "=== Python", version, "is already registered!" return CloseKey(reg) print "*** Unable to register!" print "*** You probably have another Python installation!" if __name__ == "__main__": RegisterPy()
输入以下命令（register.py 存放在 G盘底下）
显示“python 2.7 is already registered”
再安装setuptools的时候，就能自动识别出来python2.7了。
win7是 64的原因，在安装python（32位）时，如果选择只为当前用户，以上问题是不会出现的，如果选择所有用户，那就用上面的方法解决吧。
代码来自：
