Describe your issue.

Another pre-test failure in statsmodels unit testing

https://github.com/scipy/scipy/pull/17561/files#diff-c850dba4f9919cabafa6e3ffbc1d0c61cf315d1e06755a867317fd891f9e2aaaR580
added [()] to results which looks like it breaks if the value is already a scalar

from failing unit test https://dev.azure.com/statsmodels/statsmodels-testing/_build/results?buildId=5078&view=logs&j=aabc21e9-9439-578e-0393-ea6ef34c273c&t=3c5b382f-2ffe-594f-225e-664c15c6a882

        # `axis`, `nan_policy`, and `keepdims` are handled by `_axis_nan_policy`
    
        if a.size == 0:
            return ModeResult(np.nan, np.int64(0))
    
        vals, cnts = np.unique(a, return_counts=True)
        modes, counts = vals[cnts.argmax()], cnts.max()
>       return ModeResult(modes[()], counts[()])
E       TypeError: 'int' object is not subscriptable

This goes from statsmodels through pandas and then scipy.stats

I cannot extract the example (with pdb) because I don't have dev versions installed

Reproducing Code Example

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Error message

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SciPy/NumPy/Python version and system information

scipy main