Python Iinstall manager on ARM installs x86 binaries? #306

Activity

1. zooba commented on Apr 10, 2026

   

   zooba

   on Apr 10, 2026

   Member

   More actions

   If you py install 3-arm64 then you'll get the latest build for ARM64.

   See #198 for status on it becoming the default.
2. zooba

   closed this as a duplicateof Make -arm64 as default for ARM computers #198 on Apr 10, 2026
3. zooba commented on Apr 10, 2026

   

   zooba

   on Apr 10, 2026

   Member

   More actions

   You can also set the default_platform configuration setting to "upgrade" yourself to ARM64 by default early.
4. mcringbearer commented on Apr 10, 2026

   

   mcringbearer

   on Apr 10, 2026 via email

   Author

   More actions

   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.
5. zooba commented on Apr 13, 2026

   

   zooba

   on Apr 13, 2026

   Member

   More actions

   it doesn’t say what to set it too

   Haha, good catch! You want -arm64, to match the -arm64 (or -32 or -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:3 will append the default platform and use that (if it exists), and py list will indicate which platform tags are optional. You can py -V:3-64 to explicitly launch the Intel 64-bit one.