def random_state(random_state=None, force=False):
global _random_state
if _random_state is None:
_random_state = np.random.RandomState(
seed=42) if random_state is None else random_state
elif random_state is not None:
if force:
_random_state = random_state
else:
raise exc.NumericError(
'Process-wide random state is already set; it may not be set twice'
)
return _random_state
def testNumericError(self):
with self.assertRaises(exc.NumericError):
raise exc.NumericError('Failed to converge')