64位系统装了32位的Python，安装exe格式对应python版本相关的包，报错：Python version 3.5 required, which was not found in the registry。
原因是注册表缺少Python安装信息，安装时，要注意选择。
64位系统32位Python，如果使用pywin32出现DLL load failed
复制文件夹
C:\Program Files (x86)\Python36-32\Lib\site-packages\pywin32_system32\
内的文件： pythoncom36.dll pywintypes36.dll 到文件夹 C:\Windows\SysWOW64\
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1.右键安装包，“以管理员权限运行”
2.勾选“add Python 3.5 to PATH”，选择“customize installation”。
3.注意，勾选“for all users”就需要管理员权限运行。
4.勾选“Install for all users”，安装。
当然，你也可以选择使用下面了py脚本来添加Python安装信息：
import sys from _winreg import * 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()
