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

ecsv
0.0.1

This version was deleted from PyPI around 2023-12-16. Installing fails with:
$ pip3 install ecsv==0.0.1 ERROR: Could not find a version that satisfies the requirement ecsv==0.0.1
View other deleted versions of ecsv

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/2023-12-15/ \ ecsv==0.0.1
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:
ecsv-0.0.1-py3-none-any.whl (3.8KB)
ecsv-0.0.1.tar.gz (4.1KB)