old_contents: # Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # 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.
  
  import unittest
  
  from paddle.v2.plot import Ploter
  
  
  class TestCommon(unittest.TestCase):
      def test_append(self):
          title1 = "title1"
          title2 = "title2"
          plot_test = Ploter(title1, title2)
          plot_test.append(title1, 1, 2)
          plot_test.append(title1, 2, 5)
          plot_test.append(title2, 3, 4)
          self.assertEqual(plot_test.__plot_data__[title1].step, [1, 2])
          self.assertEqual(plot_test.__plot_data__[title1].value, [2, 5])
          self.assertEqual(plot_test.__plot_data__[title2].step, [3])
          self.assertEqual(plot_test.__plot_data__[title2].value, [4])
          plot_test.reset()
          self.assertEqual(plot_test.__plot_data__[title1].step, [])
          self.assertEqual(plot_test.__plot_data__[title1].value, [])
          self.assertEqual(plot_test.__plot_data__[title2].step, [])
          self.assertEqual(plot_test.__plot_data__[title2].value, [])
  
  if __name__ == '__main__':
      unittest.main()
  
new_contents: # Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # 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.
  
  import unittest
  
  from paddle.v2.plot import Ploter
  
  
  class TestCommon(unittest.TestCase):
      def test_append(self):
          title1 = "title1"
          title2 = "title2"
          plot_test = Ploter(title1, title2)
          plot_test.append(title1, 1, 2)
          plot_test.append(title1, 2, 5)
          plot_test.append(title2, 3, 4)
          self.assertEqual(plot_test.__plot_data__[title1].step, [1, 2])
          self.assertEqual(plot_test.__plot_data__[title1].value, [2, 5])
          self.assertEqual(plot_test.__plot_data__[title2].step, [3])
          self.assertEqual(plot_test.__plot_data__[title2].value, [4])
          plot_test.reset()
          self.assertEqual(plot_test.__plot_data__[title1].step, [])
          self.assertEqual(plot_test.__plot_data__[title1].value, [])
          self.assertEqual(plot_test.__plot_data__[title2].step, [])
          self.assertEqual(plot_test.__plot_data__[title2].value, [])
  
  
  if __name__ == '__main__':
      unittest.main()
  
subject: fix style problem