Closed
Description
We have a common test checking that set_output lead to the right results. However, there are some side-effect that we did not anticipate and that are not covered right now.
set_config
One can require a pandas output with set_config:
import sklearn
sklearn.set_config(transform_output="pandas")while the common test is setting the estimator using set_output, set_config (and config_context) will set the output of the nested estimators. This is something that is not tested and leads to failures as shown in #24923.
We need to add a common test with the context manager to ensure that transformers with nested transformer(s) are still working as expected.
Undefined behaviour
I did not yet make a check but I think that we should make sure to define the following behaviour:
- request pandas output without providing dataframe at
fitandtransform - request pandas output without providing dataframe at
transform