fix a few lint warnings

examples/python/vendor_scheduling_sat.py

@@ -10,6 +10,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+"""Solves a simple shift scheduling problem."""
 
 from __future__ import absolute_import
 from __future__ import division
@@ -33,8 +34,9 @@ class SolutionPrinter(cp_model.CpSolverSolutionCallback):
     self.__min_vendors = min_vendors
 
   def OnSolutionCallback(self):
+    """Called at each new solution."""
     self.__solution_count += 1
-    print ('Solution %i: ', self.__solution_count)
+    print('Solution %i: ', self.__solution_count)
     print('  min vendors:', self.__min_vendors)
     for i in range(self.__num_vendors):
       print('  - vendor %i: ' % i,
@@ -48,10 +50,12 @@ class SolutionPrinter(cp_model.CpSolverSolutionCallback):
     print()
 
   def SolutionCount(self):
+    """Returns the number of solution found."""
     return self.__solution_count
 
 
 def main():
+  """Create the shift scheduling model and solve it."""
   # Create the model.
   model = cp_model.CpModel()
 

examples/python/wedding_optimal_chart_sat.py

@@ -12,10 +12,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
-from __future__ import print_function
-from ortools.sat.python import cp_model
-import time
 """Finding an optimal wedding seating chart.
 
 From
@@ -40,6 +36,10 @@ Adapted from
 https://github.com/google/or-tools/blob/master/examples/csharp/wedding_optimal_chart.cs
 """
 
+from __future__ import print_function
+import time
+from ortools.sat.python import cp_model
+
 
 class WeddingChartPrinter(cp_model.CpSolverSolutionCallback):
   """Print intermediate solutions."""
@@ -196,7 +196,7 @@ def SolveWithDiscreteModel():
   ### Solve model.
   solver = cp_model.CpSolver()
   solution_printer = WeddingChartPrinter(seats, names, num_tables, num_guests)
-  status = solver.SolveWithSolutionCallback(model, solution_printer)
+  solver.SolveWithSolutionCallback(model, solution_printer)
 
   print("Statistics")
   print("  - conflicts    : %i" % solver.NumConflicts())