add exception for distribution
@@ -3,7 +3,7 @@ from pyro.distributions.bernoulli import Bernoulli
from pyro.distributions.beta import Beta
from pyro.distributions.categorical import Categorical
from pyro.distributions.delta import Delta
-from pyro.distributions.distribution import Distribution
+from pyro.distributions.distribution import Distribution # noqa: F401
# specific distributions
from pyro.distributions.diag_normal import DiagNormal
from pyro.distributions.dirichlet import Dirichlet
