def PyList_GetSlice(space, w_list, low, high):
    """Return a list of the objects in list containing the objects between low
    and high.  Return NULL and set an exception if unsuccessful.  Analogous
    to list[low:high].  Negative indices, as when slicing from Python, are not
    supported."""
    w_start = space.newint(low)
    w_stop = space.newint(high)
    return space.getslice(w_list, w_start, w_stop)