Many thanks to the @wyk9787 for noticing this and reaching out.

All calls to discovery.build() using 2.0.0 fail with "unknown api name or version".

from googleapiclient import discovery

client = discovery.build("cloudprofiler", "v2")

This is because the published package has no discovery_cache/documents directory.

1. python3 -m venv env
2. source env/bin/activate
3. python3 -m pip install google-api-python-client
4. ls env/lib/python*/site-packages/googleapiclient/discovery_cache

busunkim@busunkim:~/github$ ls env/lib/python*/site-packages/googleapiclient/discovery_cache
appengine_memcache.py  base.py  file_cache.py  __init__.py  __pycache__