steppy
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One `fit_transform` call on the pipeline may result in multiple `fit_transform` calls on some steps
Consider 3 steps A, B, C, connected like this: A -> B, B -> C, A -> C. Say, we fit this pipeline by calling C.fit_transform(...)
. If A is initialized with force_fitting
option, then its fit_transform
method will be called twice, which is undesirable behavior. Even when force_fitting
is False, transform is going to be called twice, which might require reconsidaration.