fixes

nifty/data_objects/distributed_do.py

@@ -238,6 +238,8 @@ class data_object(object):
     def any(self):
         return self.sum() != 0
 
+    def fill(self, value):
+        self._data.fill(value)
 
 def full(shape, fill_value, dtype=None, distaxis=0):
     return data_object(shape, np.full(local_shape(shape, distaxis),

nifty/operators/sum_operator.py

@@ -45,9 +45,9 @@ class SumOperator(LinearOperator):
             if isinstance(op, SumOperator):
                 opsnew += op._ops
                 if ng:
-                    negnew += [not n for n in ops._neg]
+                    negnew += [not n for n in op._neg]
                 else:
-                    negnew += list(ops._neg)
+                    negnew += list(op._neg)
             else:
                 opsnew.append(op)
                 negnew.append(ng)