diff --git a/kallithea/lib/vcs/backends/base.py b/kallithea/lib/vcs/backends/base.py
--- a/kallithea/lib/vcs/backends/base.py
+++ b/kallithea/lib/vcs/backends/base.py
@@ -169,14 +169,9 @@ class BaseRepository(object):
         """
         raise NotImplementedError
 
-    def __getslice__(self, i, j):
-        """
-        Returns a iterator of sliced repository
-        """
-        for rev in self.revisions[i:j]:
-            yield self.get_changeset(rev)
-
     def __getitem__(self, key):
+        if isinstance(key, slice):
+            return (self.get_changeset(rev) for rev in self.revisions[key])
         return self.get_changeset(key)
 
     def count(self):
diff --git a/kallithea/lib/vcs/nodes.py b/kallithea/lib/vcs/nodes.py
--- a/kallithea/lib/vcs/nodes.py
+++ b/kallithea/lib/vcs/nodes.py
@@ -48,8 +48,9 @@ class NodeGeneratorBase(object):
     def __call__(self):
         return [n for n in self]
 
-    def __getslice__(self, i, j):
-        for p in self.current_paths[i:j]:
+    def __getitem__(self, key):
+        assert isinstance(key, slice), key
+        for p in self.current_paths[key]:
             yield self.cs.get_node(p)
 
     def __len__(self):
@@ -82,8 +83,9 @@ class RemovedFileNodesGenerator(NodeGene
         for p in self.current_paths:
             yield RemovedFileNode(path=p)
 
-    def __getslice__(self, i, j):
-        for p in self.current_paths[i:j]:
+    def __getitem__(self, key):
+        assert isinstance(key, slice), key
+        for p in self.current_paths[key]:
             yield RemovedFileNode(path=p)