def variants(self):
    indices = (None, slice(3, None), slice(3, 8), slice(None, 8))
    foreigns = (False, True)
    return itertools.product(indices, foreigns)
def variants(self):
    indices = (None, slice(3, None), slice(3, 8), slice(None, 8))
    foreigns = (False, True)
    return itertools.product(indices, foreigns)