def is_period(arr):
warnings.warn("<STR_LIT>"<EOL>"<STR_LIT>"<EOL>"<STR_LIT>", FutureWarning, stacklevel=<NUM_LIT:2>)<EOL>return isinstance(arr, ABCPeriodIndex) or is_period_arraylike(arr)<EOL>
Check whether an array-like is a periodical index.

.. deprecated:: 0.24.0

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

Returns
-------
boolean
    Whether or not the array-like is a periodical index.

Examples
--------
>>> is_period([1, 2, 3])
False
>>> is_period(pd.Index([1, 2, 3]))
False
>>> is_period(pd.PeriodIndex(["2017-01-01"], freq="D"))
True