def METHOD_NAME(arr):
    """Return a void_p handle for a numpy array
    Parameters
    ----------
    arr: numpy.NDArray
        source numpy array
    Returns
    -------
    ptr:  ctypes.c_void_p
        pointer to the data
    """
    assert arr.dtype == np.int32
    ptr = arr.ctypes.data_as(ctypes.POINTER(ctypes.c_int32))
    return ctypes.cast(ptr, ctypes.c_void_p)