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

py-cppstd
0.3

This version was deleted from PyPI around 2025-07-29. Installing fails with:
$ pip3 install py-cppstd==0.3 ERROR: Could not find a version that satisfies the requirement py-cppstd==0.3
View other deleted versions of py-cppstd

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/2025-07-28/ \ py-cppstd==0.3
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Or, download files manually

And install manually via pip:
py_cppstd-0.3-py3-none-any.whl (12.2KB)
py_cppstd-0.3.tar.gz (9.6KB)