old_contents: from ortools.linear_solver import pywraplp
  from ortools.linear_solver import linear_solver_pb2
  from ortools.constraint_solver import pywrapcp
  from ortools.sat.python import swig_helper
  from ortools.sat.python import cp_model
  from ortools.graph import pywrapgraph
  from ortools.algorithms import pywrapknapsack_solver
  from ortools.scheduling import pywraprcpsp
  
  def lpsolver():
      print('Test lpsolver...')
      lpsolver = pywraplp.Solver(
              'LinearTest',
              pywraplp.Solver.GLOP_LINEAR_PROGRAMMING)
      lpsolver.Solve()
      print('Test lpsolver...DONE')
  
  def cpsolver():
      print('Test cpsolver...')
      cpsolver = pywrapcp.Solver('ConstraintTest')
      num_vals = 3
      x = cpsolver.IntVar(0, num_vals - 1, "x")
      y = cpsolver.IntVar(0, num_vals - 1, "y")
      z = cpsolver.IntVar(0, num_vals - 1, "z")
      cpsolver.Add(x != y)
      db = cpsolver.Phase([x, y, z], cpsolver.CHOOSE_FIRST_UNBOUND, cpsolver.ASSIGN_MIN_VALUE)
      cpsolver.Solve(db)
      print('Test cpsolver...DONE')
  
  def main():
      lpsolver()
      cpsolver()
  
  if __name__ == "__main__":
      main()
  
new_contents: import ortools
  from ortools.linear_solver import pywraplp
  from ortools.linear_solver import linear_solver_pb2
  from ortools.constraint_solver import pywrapcp
  from ortools.sat.python import swig_helper
  from ortools.sat.python import cp_model
  from ortools.graph.python import linear_sum_assignment
  from ortools.graph.python import max_flow
  from ortools.graph.python import min_cost_flow
  from ortools.algorithms import pywrapknapsack_solver
  from ortools.scheduling import pywraprcpsp
  from ortools.util.python import sorted_interval_list
  
  def lpsolver():
      print('Test lpsolver...')
      lpsolver = pywraplp.Solver(
              'LinearTest',
              pywraplp.Solver.GLOP_LINEAR_PROGRAMMING)
      lpsolver.Solve()
      print('Test lpsolver...DONE')
  
  def cpsolver():
      print('Test cpsolver...')
      cpsolver = pywrapcp.Solver('ConstraintTest')
      num_vals = 3
      x = cpsolver.IntVar(0, num_vals - 1, "x")
      y = cpsolver.IntVar(0, num_vals - 1, "y")
      z = cpsolver.IntVar(0, num_vals - 1, "z")
      cpsolver.Add(x != y)
      db = cpsolver.Phase([x, y, z], cpsolver.CHOOSE_FIRST_UNBOUND, cpsolver.ASSIGN_MIN_VALUE)
      cpsolver.Solve(db)
      print('Test cpsolver...DONE')
  
  def main():
      print(ortools.__version__)
      lpsolver()
      cpsolver()
  
  if __name__ == "__main__":
      main()
  
subject: fix sample.py