def arctan(data=None, out=None, name=None, **kwargs):
    """Returns element-wise inverse tangent of the input array.

    The output is in the closed interval :math:`[-\\pi/2, \\pi/2]`

    .. math::
       arctan([-1, 0, 1]) = [-\\pi/4, 0, \\pi/4]

    The storage type of ``arctan`` output depends upon the input storage type:

       - arctan(default) = default
       - arctan(row_sparse) = row_sparse
       - arctan(csr) = csr



    Defined in src/operator/tensor/elemwise_unary_op_trig.cc:L227

    Parameters
    ----------
    data : NDArray
        The input array.

    out : NDArray, optional
        The output NDArray to hold the result.

    Returns
    -------
    out : NDArray or list of NDArrays
        The output of this function.
    """
    return 0,
