Sorry folks, I should have left more of an explanation in the PR body.

All the Python libraries are taking major version bumps as they move onto the new generator. Important changes are described in the migration guide at the root of the repo. https://github.com/googleapis/python-tasks/blob/master/UPGRADING.md This was a 1.x.x -> 2.0.0 change, so I think it's unlikely for folks to upgrade on accident.

The sample changes needed for the tasks samples left in this repository were made as additional commits to #4622.

We discovered that proto-plus (used by all the microgen libraries) wasn't able to convert enum strings into library enum types ( the library raises errors instead about enums having to be int or long). There is a more detailed description in googleapis/proto-plus-python#52.

We released a fix for that issue but had to revert it because it caused regressions elsewhere (which is when these samples started feeling). googleapis/proto-plus-python#118 is the PR that should resolve the stringy enum issue for good. At that point it will be fine to pass a string like 'POST' or use the library provided enum type: tasks.Http.method.POST.