def where(condition=None, x=None, y=None, out=None, name=None, **kwargs):
    """Return the elements, either from x or y, depending on the condition.

    Given three ndarrays, condition, x, and y, return an ndarray with the elements from x or y,
    depending on the elements from condition are true or false. x and y must have the same shape.
    If condition has the same shape as x, each element in the output array is from x if the
    corresponding element in the condition is true, and from y if false.

    If condition does not have the same shape as x, it must be a 1D array whose size is
    the same as x's first dimension size. Each row of the output array is from x's row
    if the corresponding element from condition is true, and from y's row if false.

    Note that all non-zero values are interpreted as ``True`` in condition.

    Examples::

      x = [[1, 2], [3, 4]]
      y = [[5, 6], [7, 8]]
      cond = [[0, 1], [-1, 0]]

      where(cond, x, y) = [[5, 2], [3, 8]]

      csr_cond = cast_storage(cond, 'csr')

      where(csr_cond, x, y) = [[5, 2], [3, 8]]



    Defined in src/operator/tensor/control_flow_op.cc:L57

    Parameters
    ----------
    condition : NDArray
        condition array
    x : NDArray
    y : NDArray

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

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