[WIP] Add verbose option for Pipeline and Feature Union [rebased 8568] - #9668

[WIP] Add verbose option for Pipeline and Feature Union [rebased 8568]#9668

petrushev wants to merge 12 commits into

scikit-learn:masterscikit-learn/scikit-learn:masterfrom

petrushev:pipeline-verbose-rebasedpetrushev/scikit-learn:pipeline-verbose-rebasedCopy head branch name to clipboard