Whether the categories have an ordered relationship.
Examples
>>> cat_type = pd.CategoricalDtype(categories=['a', 'b'], ordered=True)
>>> cat_type.ordered
True
>>> cat_type = pd.CategoricalDtype(categories=['a', 'b'], ordered=False)
>>> cat_type.ordered
False
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https://pandas.pydata.org/pandas-docs/version/2.3.0/reference/api/pandas.CategoricalDtype.ordered.html