replaced exception by inpection (correctDrift)

solves #331 (closed)

changed milestone to %2.1.0

added accepted cleanup/refactoring python labels

requested review from @schaefed

assigned to @luenensc

approved this merge request

merged

mentioned in commit 30a4576f

mentioned in issue #331 (closed)

mentioned in commit 63b55c6d

mentioned in commit 684dc8a0

mentioned in commit 8f7a90e4