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Force locator and formatter inheritance#18203
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I agree with@timhoffm that these should be TypeError
Passing arguments of the wrong type (e.g. passing a list when an int is expected) should result in a TypeError, but passing arguments with the wrong value (e.g. a number outside expected boundaries) should result in a ValueError.
Deprecated in 3.2, locators and formatters are now forced to be sub-classes of their respective base class.