【转载】windows安装python2.7后的注册表问题

Z时代
2024-01-10
分类：综合

python

原文出自：https://www.cnblogs.com/tlz888/p/6879227.html

【提要】win平台上，python2.7官网的安装包在安装后不会添加环境变量且不会把安装信息写入注册表。

把python和pip的安装路径添加到环境变量是做python开发必要的一步，而写入注册表的原因是，有些python包以

windows installer的形式安装，安装的时候需要用到python的注册表信息，比如，numpy, scipy。

安装步骤：

　　（1）到python官网下载安装包，www.python.org/downloads，运行安装；

　　（2）把python.exe所在路径（python安装路径）以及pip.exe路径（python安装路径下的Script文件加）添加到path环境变量。

比如我的python在这里：“C:\Python27”，那么添加路径：“C:\Python27”和“C:\Python27\Scripts”到path环境变量;

　　（3）在注册表中添加python注册信息，用于python可以操作windows的注册表，可以运行python文件来完成此步操作，

以下为python源码，把它拷贝出来，放在任意位置，用python运行即可。

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():
    print "begin RegisterPy "
    try:
        print "open key : %s"%regpath
        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 "*** EXCEPT: 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 "*** ERROR:Unable to register!" 
    print "*** REASON:You probably have another Python installation!"
def UnRegisterPy():
    #print "begin UnRegisterPy "
    try:
        print "open HKEY_CURRENT_USER key=%s"%(regpath)
        reg = OpenKey(HKEY_CURRENT_USER, regpath)
        #reg = OpenKey(HKEY_LOCAL_MACHINE, regpath)
    except EnvironmentError:  
        print "*** Python not registered?!"
        return
    try:
       DeleteKey(reg, installkey)
       DeleteKey(reg, pythonkey)
       DeleteKey(HKEY_LOCAL_MACHINE, regpath)
    except:
       print "*** Unable to un-register!"
    else:
       print "--- Python", version, "is no longer registered!"            
if __name__ == "__main__":  
    RegisterPy()