[issue6792] Distutils-based installer does not detect 64bit versions of Python
Stephen White
report at bugs.python.org
Thu Mar 4 17:29:46 CET 2010
Stephen White <stephen-python.org at randomstuff.org.uk> added the comment:
32bit apps can query the 64bit registry, using the appropriate security and access rights options such as KEY_WOW64_64KEY (0x0100).
Similarly KEY_WOW64_32KEY can be used for 64bit apps to read/write the 32bit registry without having to have knowledge of how the Wow6432Nodes are arranged .
These mean that a 64bit aware app, whether compiled as 64 or 32 bits, can access the alternative view of the registry.
http://msdn.microsoft.com/en-us/library/ms724897(VS.85).aspx
http://msdn.microsoft.com/en-us/library/ms724878(VS.85).aspx
For example if you have both 64 and 32 bit copies of Python installed then a Python app running under the 32bit copy of Python can query the location of the 64bit copy of Python using code like:
key64 = _winreg.OpenKey(_winreg.HKEY_LOCAL_MACHINE, "Software\\Python\\PythonCore\\2.6\\PythonPath", 0, _winreg.KEY_READ + 0x0100)
_winreg.QueryValue(key, "")
C code can do similarly.
----------
nosy: +Stephen.White
_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue6792>
_______________________________________
More information about the Python-bugs-list
mailing list