def is_categorical(arr):
return isinstance(arr, ABCCategorical) or is_categorical_dtype(arr)<EOL>
Check whether an array-like is a Categorical instance.

Parameters
----------
arr : array-like
    The array-like to check.

Returns
-------
boolean
    Whether or not the array-like is of a Categorical instance.

Examples
--------
>>> is_categorical([1, 2, 3])
False

Categoricals, Series Categoricals, and CategoricalIndex will return True.

>>> cat = pd.Categorical([1, 2, 3])
>>> is_categorical(cat)
True
>>> is_categorical(pd.Series(cat))
True
>>> is_categorical(pd.CategoricalIndex([1, 2, 3]))
True