@llucax, we can't import the async stub like this, right? Should this only be under if typing.TYPE_CHECKING:?

This was done here in the example section of the upgrading section of the new base client release. But since it's just an example I don't know if it was tested

I just tried as well, can't find an easy solution. I guess we need to wait for @llucax

try just importing

from frequenz.api.electricity_trading.v1 import electricity_trading_pb2_grpc

and then just using electricity_trading_pb2_grpc.ElectricityTradingServiceAsyncStub with a global setting to disable the no-member check in pyproject.toml

[tool.pylint.messages_control]
disable = [
  [..]
  # Checked by mypy
  "no-member",
  [..]
]

Thanks @Marenz for the summary, that should work.

I just updated the release notes (once again) to hopefully provide instructions that finally work.

Correction: I wrote electricity_trading_pb2 but meant electricity_trading_pb2_grpc, it is updated in my comment

I still get an error from pytest_min and pytest_max:

ERROR AttributeError: module 'frequenz.api.electricity_trading.v1.electricity_trading_pb2_grpc' has no attribute 'ElectricityTradingServiceAsyncStub'

It seems there's another problem here.

We have to create the _stub when we are connecting. So if connect=False, we can't create the stub immediately, because there's no channel.

And we're going to have to override connect, to call super.connect(), then create the stub.

@llucax this is also not covered in the upgrade notes.

I'll try to make a working patch for this now.

The new base client's interface feels inconsistent compared to the older one because we have to override connect, but with that, it works for now.