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

ecmascript-5-1-guifan-zhongwenban
2024.3.1.0

This version was deleted from PyPI around 2024-03-14. Installing fails with:
$ pip3 install ecmascript-5-1-guifan-zhongwenban==2024.3.1.0 ERROR: Could not find a version that satisfies the requirement ecmascript-5-1-guifan-zhongwenban==2024.3.1.0
View other deleted versions of ecmascript-5-1-guifan-zhongwenban

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/2024-03-13/ \ ecmascript-5-1-guifan-zhongwenban==2024.3.1.0
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:
ecmascript_5_1_guifan_zhongwenban-2024.3.1.0-py3-none-any.whl (637.4KB)
ecmascript-5-1-guifan-zhongwenban-2024.3.1.0.tar.gz (618.9KB)