Hello, Andrey! The problem is that its GitHub release does not contains all files. You can check the file: https://github.com/googleapis/google-cloud-python/archive/refs/tags/google-ai-generativelanguage-v0.6.10.tar.gz
An easy and good solution is that they add docs in its pypi release. I suggest them to do so: https://github.com/googleapis/google-cloud-python/issues/13168 Or, add setup.py or pyproject.toml in their GitHub release. Best regards, EiPi Fun/Dong Xu