def is_datetime64_dtype(arr_or_dtype):
return _is_dtype_type(arr_or_dtype, classes(np.datetime64))<EOL>
Check whether an array-like or dtype is of the datetime64 dtype.

Parameters
----------
arr_or_dtype : array-like
    The array-like or dtype to check.

Returns
-------
boolean
    Whether or not the array-like or dtype is of the datetime64 dtype.

Examples
--------
>>> is_datetime64_dtype(object)
False
>>> is_datetime64_dtype(np.datetime64)
True
>>> is_datetime64_dtype(np.array([], dtype=int))
False
>>> is_datetime64_dtype(np.array([], dtype=np.datetime64))
True
>>> is_datetime64_dtype([1, 2, 3])
False