old_contents: #!/usr/bin/python
  # 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 sys
  import re
  import math
  
  
  def get_best_pass(filename):
      with open(filename, 'r') as f:
          text = f.read()
          pattern = re.compile('Test.*? cost=([0-9]+\.[0-9]+).*?pass-([0-9]+)',
                               re.S)
          results = re.findall(pattern, text)
          sorted_results = sorted(results, key=lambda result: float(result[0]))
          return sorted_results[0]
  
  
  filename = sys.argv[1]
  LOG = get_best_pass(filename)
  predict_error = math.sqrt(float(LOG[0])) / 2
  print 'Best pass is %s, error is %s, which means predict get error as %f' % (
      LOG[1], LOG[0], predict_error)
  
  evaluate_pass = "output/pass-%s" % LOG[1]
  print "evaluating from pass %s" % evaluate_pass
  
new_contents: #!/usr/bin/python
  # 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 sys
  import re
  import math
  
  
  def get_best_pass(filename):
      with open(filename, 'r') as f:
          text = f.read()
          pattern = re.compile('Test.*? cost=([0-9]+\.[0-9]+).*?pass-([0-9]+)',
                               re.S)
          results = re.findall(pattern, text)
          sorted_results = sorted(results, key=lambda result: float(result[0]))
          return sorted_results[0]
  
  
  filename = sys.argv[1]
  log = get_best_pass(filename)
  predict_error = math.sqrt(float(log[0])) / 2
  print 'Best pass is %s, error is %s, which means predict get error as %f' % (
      log[1], log[0], predict_error)
  
  evaluate_pass = "output/pass-%s" % log[1]
  print "evaluating from pass %s" % evaluate_pass
  
subject: change LOG to log