将python安装信息加入注册表的示例

背景

重装系统，发现之前装在E盘的python可以直接使用，就只是将python的安装目录加入到环境变量中，也一直没有管它，今天跟天软交互的时候发现一直不成功，猜测可能是没有注册表信息。

从网上找的一段代码，直接复制运行即可，留存备查。

代码

py3.5.2

import sys

from winreg import *

# tweak as necessary
version = 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()

py2.*版本

'''
解决注册问题，pywin32安装存在问题
'''

import sys

from _winreg import *

# tweak as necessary
version = 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()

来源：https://blog.csdn.net/u011702002/article/details/79624256