old_contents: #!/bin/env python
  # Copyright (c) 2020 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.
  """ Get pull requests. """
  
  import os
  import time
  import os.path
  from github import Github
  
  
  class PRChecker(object):
      """ PR Checker. """
  
      def __init__(self):
          self.github = Github(os.getenv('GITHUB_API_TOKEN'), timeout=60)
          self.repo = None
  
      def check(self):
          """ check pr """
          filename = 'block.txt'
          pr_id = os.getenv('GIT_PR_ID')
          if not pr_id:
              print('No PR ID')
              exit(0)
          print(pr_id)
          if not os.path.isfile(filename):
              print('No author to check')
              exit(0)
          self.repo = self.github.get_repo('PaddlePaddle/Paddle')
          pr = self.repo.get_pull(int(pr_id))
          user = pr.user.login
          with open(filename) as f:
              for l in f:
                  if l.rstrip('\r\n') == user:
                      print('{} has UT to be fixed, so CI failed.'.format(user))
                      exit(1)
          exit(0)
  
  
  if __name__ == '__main__':
      pr_checker = PRChecker()
      pr_checker.check()
  
new_contents: #!/bin/env python
  # Copyright (c) 2020 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.
  """ Get pull requests. """
  
  import os
  import time
  import os.path
  from github import Github
  
  
  class PRChecker(object):
      """ PR Checker. """
  
      def __init__(self):
          self.github = Github(os.getenv('GITHUB_API_TOKEN'), timeout=60)
          self.repo = None
  
      def check(self):
          """ check pr. """
          filename = 'block.txt'
          pr_id = os.getenv('GIT_PR_ID')
          if not pr_id:
              print('No PR ID')
              exit(0)
          print(pr_id)
          if not os.path.isfile(filename):
              print('No author to check')
              exit(0)
          self.repo = self.github.get_repo('PaddlePaddle/Paddle')
          pr = self.repo.get_pull(int(pr_id))
          user = pr.user.login
          with open(filename) as f:
              for l in f:
                  if l.rstrip('\r\n') == user:
                      print('{} has unit-test to be fixed, so CI failed.'.format(
                          user))
                      exit(1)
          exit(0)
  
  
  if __name__ == '__main__':
      pr_checker = PRChecker()
      pr_checker.check()
  
subject: Fix error msg to match check_api_approvals.sh (#24777)