diff --git a/networkx/algorithms/isomorphism/isomorphvf2.py b/networkx/algorithms/isomorphism/isomorphvf2.py
index 54d66ef718b..6d240ade6fd 100644
--- a/networkx/algorithms/isomorphism/isomorphvf2.py
+++ b/networkx/algorithms/isomorphism/isomorphvf2.py
@@ -270,10 +270,8 @@ def is_isomorphic(self):
         if self.G1.order() != self.G2.order(): return False
     
         # Check local properties
-        d1=list(self.G1.degree().values())
-        d1.sort()
-        d2=list(self.G2.degree().values())
-        d2.sort()
+        d1=sorted(self.G1.degree().values())
+        d2=sorted(self.G2.degree().values())
         if d1 != d2: return False
 
         try:
diff --git a/networkx/algorithms/isomorphism/tests/test_isomorphvf2.py b/networkx/algorithms/isomorphism/tests/test_isomorphvf2.py
index 7218cc9bc6f..bb663e36dca 100644
--- a/networkx/algorithms/isomorphism/tests/test_isomorphvf2.py
+++ b/networkx/algorithms/isomorphism/tests/test_isomorphvf2.py
@@ -34,8 +34,7 @@ def test_graph(self):
         gm = vf2.GraphMatcher(g1,g2)
         assert_true(gm.is_isomorphic())
 
-        mapping = list(gm.mapping.items())
-        mapping.sort()
+        mapping = sorted(gm.mapping.items())
         isomap = [('a', 1), ('b', 6), ('c', 3), ('d', 8), 
                   ('g', 2), ('h', 5), ('i', 4), ('j', 7)]
         assert_true(mapping==isomap)
diff --git a/networkx/classes/graph.py b/networkx/classes/graph.py
index a26c1085df1..9984806f9e0 100644
--- a/networkx/classes/graph.py
+++ b/networkx/classes/graph.py
@@ -972,7 +972,7 @@ def neighbors(self, n):
 
         """
         try:
-            return list(self.adj[n].keys())
+            return list(self.adj[n])
         except KeyError:
             raise NetworkXError("The node %s is not in the graph."%(n,))
 
@@ -1713,7 +1713,7 @@ def add_path(self, nodes, **attr):
 
         """
         nlist = list(nodes)
-        edges=list(zip(nlist[:-1],nlist[1:]))
+        edges=zip(nlist[:-1],nlist[1:])
         self.add_edges_from(edges, **attr)
 
     def add_cycle(self, nodes, **attr):
@@ -1739,7 +1739,7 @@ def add_cycle(self, nodes, **attr):
 
         """
         nlist = list(nodes)
-        edges=list(zip(nlist,nlist[1:]+[nlist[0]]))
+        edges=zip(nlist,nlist[1:]+[nlist[0]])
         self.add_edges_from(edges, **attr)
 
 
diff --git a/networkx/generators/tests/test_degree_seq.py b/networkx/generators/tests/test_degree_seq.py
index 6ed8ca0a166..b4b8228b678 100644
--- a/networkx/generators/tests/test_degree_seq.py
+++ b/networkx/generators/tests/test_degree_seq.py
@@ -195,13 +195,11 @@ def test_invalid2(self):
 
 def test_li_smax():
     G = networkx.barabasi_albert_graph(25,1) #Any old graph
-    Gdegseq = list(G.degree().values()) #degree sequence
-    Gdegseq.sort(reverse=True)
+    Gdegseq = sorted(G.degree().values(),reverse=True) #degree sequence
     # Tests the 'unconstrained version'
     assert_true(not (sum(Gdegseq)%2)) 
     Gmax = networkx.li_smax_graph(Gdegseq) 
-    Gmaxdegseq = list(Gmax.degree().values())
-    Gmaxdegseq.sort(reverse=True)
+    Gmaxdegseq = sorted(Gmax.degree().values(),reverse=True)
     assert_equal(G.order(),Gmax.order()) #Sanity Check on the nodes
     # make sure both graphs have the same degree sequence
     assert_equal(Gdegseq,Gmaxdegseq)