Test for class_weights when using a dictionary and referring to an invalid class #8387
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Reference Issue
What does this implement/fix? Explain your changes.
This adds a test called "test_class_weight_with_string_label" that sees if an illegal non-integer class defined in "class_weights" will raise the ValueError. When this test is run on the original code, there is an error that occurs but when run on the revised code it passes the test.
Any other comments?