diff --git a/examples/python/hidato_table.py b/examples/python/hidato_table.py
index ebc617d51e..19c5616ac8 100644
--- a/examples/python/hidato_table.py
+++ b/examples/python/hidato_table.py
@@ -168,10 +168,10 @@ def Solve(model):
 
   solver.EndSearch()
 
-  print('num_solutions:', num_solutions)
-  print('failures:', solver.Failures())
-  print('branches:', solver.Branches())
-  print('wall time:', solver.WallTime())
+  print('num_solutions: %i' % num_solutions)
+  print('failures: %i' % solver.Failures())
+  print('branches: %i' % solver.Branches())
+  print('wall time:%i' % solver.WallTime())
 
 
 def PrintOneSolution(positions, rows, cols, num_solution):
diff --git a/examples/python/knapsack.py b/examples/python/knapsack.py
index 929be3ddf1..546654373a 100644
--- a/examples/python/knapsack.py
+++ b/examples/python/knapsack.py
@@ -46,7 +46,7 @@ def main(unused_argv):
   solver.Init(profits, weights, capacities)
   computed_profit = solver.Solve()
 
-  print('optimal profit = ' + str(computed_profit) + '/' + str(optimal_profit))
+  print('optimal profit = %i/%i' % (computed_profit, optimal_profit))
 
 
 if __name__ == '__main__':
diff --git a/examples/python/tsp.py b/examples/python/tsp.py
index ad2c74b0a6..b288516439 100644
--- a/examples/python/tsp.py
+++ b/examples/python/tsp.py
@@ -107,7 +107,7 @@ def main(_):
       from_node = rand.randrange(FLAGS.tsp_size - 1)
       to_node = rand.randrange(FLAGS.tsp_size - 1) + 1
       if routing.NextVar(from_node).Contains(to_node):
-        print('Forbidding connection ' + str(from_node) + ' -> ' + str(to_node))
+        print('Forbidding connection %i -> %i' % (from_node, to_node))
         routing.NextVar(from_node).RemoveValue(to_node)
         forbidden_connections += 1