Support multiple inheritance in torch.distributions

torch/distributions/constraint_registry.py

@@ -82,6 +82,7 @@ class ConstraintRegistry(object):
     """
     def __init__(self):
         self._registry = {}
+        super(ConstraintRegistry, self).__init__()
 
     def register(self, constraint, factory=None):
         """

torch/distributions/distribution.py

@@ -34,6 +34,7 @@ def __init__(self, batch_shape=torch.Size(), event_shape=torch.Size(), validate_
                     continue  # skip checking lazily-constructed args
                 if not constraint.check(getattr(self, param)).all():
                     raise ValueError("The parameter {} has invalid values".format(param))
+        super(Distribution, self).__init__()
 
     def expand(self, batch_shape, _instance=None):
         """

torch/distributions/transforms.py

@@ -83,6 +83,7 @@ def __init__(self, cache_size=0):
             self._cached_x_y = None, None
         else:
             raise ValueError('cache_size must be 0 or 1')
+        super(Transform, self).__init__()
 
     @property
     def inv(self):