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

bigdl-core-xe-21
2.6.0b20250302

This version was deleted from PyPI around 2025-03-31. Installing fails with:
$ pip3 install bigdl-core-xe-21==2.6.0b20250302 ERROR: Could not find a version that satisfies the requirement bigdl-core-xe-21==2.6.0b20250302
View other deleted versions of bigdl-core-xe-21

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/2025-03-30/ \ bigdl-core-xe-21==2.6.0b20250302
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:
bigdl_core_xe_21-2.6.0b20250302-cp39-cp39-manylinux2010_x86_64.whl (39.7MB)
bigdl_core_xe_21-2.6.0b20250302-cp310-cp310-manylinux2010_x86_64.whl (39.7MB)
bigdl_core_xe_21-2.6.0b20250302-cp311-cp311-manylinux2010_x86_64.whl (39.7MB)