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

bigdl-core-xe-21
2.5.0b20240526

This version was deleted from PyPI around 2024-06-21. Installing fails with:
$ pip3 install bigdl-core-xe-21==2.5.0b20240526 ERROR: Could not find a version that satisfies the requirement bigdl-core-xe-21==2.5.0b20240526
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/2024-06-20/ \ bigdl-core-xe-21==2.5.0b20240526
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Or, download files manually

And install manually via pip:
bigdl_core_xe_21-2.5.0b20240526-cp39-cp39-manylinux2010_x86_64.whl (94.7MB)
bigdl_core_xe_21-2.5.0b20240526-cp310-cp310-manylinux2010_x86_64.whl (94.7MB)
bigdl_core_xe_21-2.5.0b20240526-cp311-cp311-manylinux2010_x86_64.whl (94.7MB)