Has anyone successfully implemented a custom expectation for the use with kedro-expectations? When I copy an example of a custom exception (https://github.com/great-expectations/great_expectations/blob/develop/contrib/expe[…]erimental/expectations/expect_multicolumn_values_to_be_equal.py) to gx/plugins/expectations, gx is not able to find it and throws an exception.

Someone will reply to you shortly. In the meantime, this might help:

Which plugin are you using? Is it https://gitlab.com/anacision/kedro-expectations?

Yes, it is. I run

kedro run

and kedro-expectations is integrated via a hook. But the run of the custom expectation fails as the respective file was not imported.