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Stephan Seitz authored Dec 06, 2020 and Markus Holzer committed Dec 06, 2020

We have to try from newest to oldest import to avoid deprecation
warnings.

Frederik Hennig authored Oct 07, 2020 and Markus Holzer committed Oct 07, 2020

- `shift_slice` did not work for single slices as it always tried to
iterate its argument
- `shift_slice` returned lists of slices, but for accessing numpy
arrays, tuples of slices are required