pep8

src/Model/BoundaryCondition/BoundaryCondition.py

@@ -374,8 +374,8 @@ class BoundaryCondition(SQLSubModel):
 
     def reach(self, river):
         edges = []
-        if self._node != None:
-            if river != None:
+        if self._node is not None:
+            if river is not None:
                 for edge in river.edges():
                     if edge.node1.name == self._node.name:
                         edges.append(edge.reach)