def __init__(self, groups=None):
        super(GroupedRequirements, self).__init__(NamedRequirements)
        self.groups = groups or self.default_groups
        self.filename = None
        self.create_default_groups()
def tearDown(self):
        if hasattr(self, "rng_state"):
            torch.set_rng_state(self.rng_state)