Add features to io (#407)

* add feature as per #405

* feature for #406

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* black

* Revert "feature for #406"

This reverts commit 766f95f.

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Gregor Sturm <[email protected]>