vpypi is a CLI tool to verify GPG signature for Python packages on PyPI.
python3 -m pip install --user vpypi
$ python3.9 -m vpypi flask==1.1.1
{
"created": "2019-07-08",
"fingerprint": "AD253D8661D175D001F462D77A1C87E3F5BC42A8",
"key_id": "7A1C87E3F5BC42A8",
"name": "Flask-1.1.1-py2.py3-none-any.whl",
"status": "signature valid",
"username": "David Lord <davidism@gmail.com>"
}
{
"created": "2019-07-08",
"fingerprint": "AD253D8661D175D001F462D77A1C87E3F5BC42A8",
"key_id": "7A1C87E3F5BC42A8",
"name": "Flask-1.1.1.tar.gz",
"status": "signature valid",
"username": "David Lord <davidism@gmail.com>"
}