def scatter_add(a, slices, value):
    """Adds given values to specified elements of an array.

    It adds ``value`` to the specified elements of ``a``.
    If all of the indices target different locations, the operation of
    :func:`scatter_add` is equivalent to ``a[slices] = a[slices] + value``.
    If there are multiple elements targeting the same location,
    :func:`scatter_add` uses all of these values for addition. On the other
    hand, ``a[slices] = a[slices] + value`` only adds the contribution from one
    of the indices targeting the same location.

    Note that just like an array indexing, negative indices are interpreted as
    counting from the end of an array.

    Example
    -------
    >>> import cupy
    >>> a = cupy.zeros((6,))
    >>> i = cupy.array([1, 0, 1])
    >>> v = cupy.array([1., 1., 1.])
    >>> cupy.scatter_add(a, i, v);
    >>> a
    array([ 1.,  2.,  0.,  0.,  0.,  0.])

    Args:
        a (ndarray): An array that gets added.
        slices: It is integer, slices, ellipsis, numpy.newaxis,
            integer array-like or tuple of them.
            It works for slices used for
            :func:`cupy.ndarray.__getitem__` and
            :func:`cupy.ndarray.__setitem__`.
        v (array-like): Values to increment ``a`` at referenced locations.

    .. note::
        It only supports types that are supported by CUDA's atomicAdd.
        The supported types are ``numpy.float32``, ``numpy.int32``,
        ``numpy.uint32``, ``numpy.uint64`` and ``numpy.ulonglong``.

    .. note::
        :func:`scatter_add` does not raise an error when indices exceed size of
        axes. Instead, it wraps indices.

    """
    a.scatter_add(slices, value)

def scatter_add(a, slices, value):
    """Adds given values to specified elements of an array.

    It adds ``value`` to the specified elements of ``a``.
    If all of the indices target different locations, the operation of
    :func:`scatter_add` is equivalent to ``a[slices] = a[slices] + value``.
    If there are multiple elements targeting the same location,
    :func:`scatter_add` uses all of these values for addition. On the other
    hand, ``a[slices] = a[slices] + value`` only adds the contribution from one
    of the indices targeting the same location.

    Note that just like an array indexing, negative indices are interpreted as
    counting from the end of an array.

    Example
    -------
    >>> import numpy
    >>> import cupy
    >>> a = cupy.zeros((6,), dtype=numpy.float32)
    >>> i = cupy.array([1, 0, 1])
    >>> v = cupy.array([1., 1., 1.])
    >>> cupy.scatter_add(a, i, v);
    >>> a
    array([ 1.,  2.,  0.,  0.,  0.,  0.], dtype=float32)

    Args:
        a (ndarray): An array that gets added.
        slices: It is integer, slices, ellipsis, numpy.newaxis,
            integer array-like or tuple of them.
            It works for slices used for
            :func:`cupy.ndarray.__getitem__` and
            :func:`cupy.ndarray.__setitem__`.
        v (array-like): Values to increment ``a`` at referenced locations.

    .. note::
        It only supports types that are supported by CUDA's atomicAdd.
        The supported types are ``numpy.float32``, ``numpy.int32``,
        ``numpy.uint32``, ``numpy.uint64`` and ``numpy.ulonglong``.

    .. note::
        :func:`scatter_add` does not raise an error when indices exceed size of
        axes. Instead, it wraps indices.

    """
    a.scatter_add(slices, value)

Fix doctest in scatter_add