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

byctp
0.26.1.21

This version was deleted from PyPI around 2026-04-08. Installing fails with:
$ pip3 install byctp==0.26.1.21 ERROR: Could not find a version that satisfies the requirement byctp==0.26.1.21
View other deleted versions of byctp

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/2026-04-07/ \ byctp==0.26.1.21
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Or, download files manually

And install manually via pip:
byctp-0.26.1.21-py3-none-any.whl (36.9MB)
byctp-0.26.1.21.tar.gz (36.0MB)