Repository navigation
Python Iinstall manager on ARM installs x86 binaries? #306
Description
Activity
You can also set the
default_platformconfiguration setting to "upgrade" yourself to ARM64 by default early.- Thanks Steve, I look at the documentation at configuration setting <https://docs.python.org/3.14/using/windows.html#configuration> , it doesn’t say what to set it too. Are you saying set it to ‘upgrade’? Doesn’t that assume the current installed binaries are already ARM64? So on a new Windows ARM system, it first has to be initially installed manually with ARM binaries, otherwise this configuration setting will simply upgrade to the latest Intel x64. Same with your suggestion to use py install 3-arm64 If the system is installed with x64, will this REPLACE that with ARM, or will both platform binaries exist?…On Apr 10, 2026, at 1:58 AM, Steve Dower ***@***.***> wrote: zooba left a comment (python/pymanager#306) <#306 (comment)> You can also set the default_platform configuration setting <https://docs.python.org/3.14/using/windows.html#configuration> to "upgrade" yourself to ARM64 by default early. — Reply to this email directly, view it on GitHub <#306 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AB3B3Z7QFXI6GXFWMY3SXO34VCZR3AVCNFSM6AAAAACXRWFYTGVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHM2DEMRSGM3TIMRYGU>. You are receiving this because you authored the thread.
it doesn’t say what to set it too
Haha, good catch! You want
-arm64, to match the-arm64(or-32or-64) that you'd add to the usual tag.will this REPLACE that with ARM, or will both platform binaries exist?
Both will exist.
py -V:3will append the default platform and use that (if it exists), andpy listwill indicate which platform tags are optional. You canpy -V:3-64to explicitly launch the Intel 64-bit one.
python Windows install manager 26.1.msix, on Windows 11 ARM 25H2, downloaded from python.org.
Appears to install x86 Intel binaries?
(Whereas python-3.14.4-arm64.exe as expected installs ARM binaries.)
It would be nice if the install manager reported the platform and informs user what is about to be installed, and tell user if they really want ARM binaries to use the dedicated ARM install EXE, not the MSIX. There is no indication to the user that x86 will be installed.