Christian Clauss 7ebe2b9593
Test the exception conditions (#1853)
* Text exception conditions

These are ValueErrors, not AttributeErrors.

* fixup! Format Python code with psf/black push

* Update perceptron.py

* Update perceptron.py

* Update perceptron.py

* Revert the test

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
2020-04-13 02:10:21 +02:00
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