The error message "np.datetime64 'position' values, require np.timedelta64 'widths'" has the same grammatical issue as the previous error message. The comma after "values" creates a comma splice. Consider removing the comma or restructuring the message for better clarity and grammar.

Accessingpositions[0] without checking if positions is non-empty could raise an IndexError. While the code validates thatlen(positions) == N on line 9052, ifN (which equalslen(vpstats)) is 0, positions could be an empty list. Consider adding a check for empty positions/vpstats or documenting that vpstats must be non-empty.

The variablewidth0 is assigned fromwidths whennp.isscalar(widths) is True, but at this point in the code,widths has already been converted to a list on line 9057 when it was a scalar. This meanswidth0 will always be assigned fromwidths[0], making the conditional logic incorrect. The check should use the original widths parameter before conversion.

The match string for pytest.raises is split across two lines without proper line continuation formatting. This could lead to issues if formatting changes or the line is refactored. Consider using proper line continuation with parentheses or joining into a single line for better maintainability and consistency with pytest best practices.

The error message "datetime/date 'position' values, require timedelta 'widths'" has incorrect grammar. The comma after "values" creates a comma splice. The message should either be: "datetime/date 'position' values require timedelta 'widths'" (remove comma) or "For datetime/date 'position' values, timedelta 'widths' are required" (restructure). Additionally, the message would be more helpful if it included an example as mentioned in the PR description.

While these tests verify that incorrect combinations of datetime positions with float widths raise errors, there's no test for the successful case where datetime positions are paired with timedelta widths (or np.datetime64 with np.timedelta64). Add positive test cases to ensure that the correct usage actually works and doesn't raise an error, similar to test_numeric_positions_with_float_widths_ok.

The test function nametest_mixed_positions_datetime_and_numeric_behaves is unclear. The suffix "behaves" doesn't indicate what behavior is being tested. Consider renaming totest_mixed_positions_datetime_and_numeric_raises to be consistent with the other test names in this group and clearly indicate that this test expects an error to be raised.

The match string for pytest.raises is split across two lines without proper line continuation formatting. This could lead to issues if formatting changes or the line is refactored. Consider using proper line continuation with parentheses or joining into a single line for better maintainability and consistency with pytest best practices.

The match string for pytest.raises is split across two lines without proper line continuation formatting. This could lead to issues if formatting changes or the line is refactored. Consider using proper line continuation with parentheses or joining into a single line for better maintainability and consistency with pytest best practices.