You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

mindspore
1.2.1

This version was deleted from PyPI around 2025-02-20. Installing fails with:
$ pip3 install mindspore==1.2.1 ERROR: Could not find a version that satisfies the requirement mindspore==1.2.1
View other deleted versions of mindspore

Install through StableBuild

You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2025-02-19/ \ mindspore==1.2.1
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip:
mindspore-1.2.1-cp37-cp37m-manylinux1_x86_64.whl (81.8MB)
mindspore-1.2.1-cp37-cp37m-win_amd64.whl (37.0MB)
mindspore-1.2.1-cp37-none-any.whl (60.9MB)
mindspore-1.2.1-cp38-cp38-manylinux1_x86_64.whl (81.8MB)
mindspore-1.2.1-cp38-none-any.whl (61.0MB)
mindspore-1.2.1-cp39-cp39-manylinux1_x86_64.whl (82.3MB)
mindspore-1.2.1-cp39-none-any.whl (61.4MB)