old_contents: #!/usr/bin/env python3
  
  # Copyright (C) 2016 Freie Universität Berlin
  #
  # This file is subject to the terms and conditions of the GNU Lesser
  # General Public License v2.1. See the file LICENSE in the top level
  # directory for more details.
  
  from __future__ import print_function
  import os
  import sys
  
  sys.path.append(os.path.join(os.environ['RIOTBASE'], 'dist/tools/testrunner'))
  import testrunner
  
  ACCEPTED_ERROR = 20
  
  
  def testfunc(child):
      child.expect(r"Testing generic evtimer \(start time = (\d+) ms\)")
      timer_offset = int(child.match.group(1))
      child.expect(r"Are the reception times of all (\d+) msgs close to the supposed values?")
      numof = int(child.match.group(1))
  
      for i in range(numof):
          child.expect(r'At \s*(\d+) ms received msg %i: "supposed to be (\d+)"' % i)
          stop = int(time.time() * 1000)
          # check if output is correct
          exp = int(child.match.group(2)) + timer_offset
          assert(int(child.match.group(1)) in range(exp - ACCEPTED_ERROR, exp + ACCEPTED_ERROR + 1))
          print(".", end="", flush=True)
      print("")
      print("All tests successful")
  
  if __name__ == "__main__":
      sys.exit(testrunner.run(testfunc, echo=False))
  
new_contents: #!/usr/bin/env python3
  
  # Copyright (C) 2016 Freie Universität Berlin
  #
  # This file is subject to the terms and conditions of the GNU Lesser
  # General Public License v2.1. See the file LICENSE in the top level
  # directory for more details.
  
  from __future__ import print_function
  import os
  import sys
  
  sys.path.append(os.path.join(os.environ['RIOTBASE'], 'dist/tools/testrunner'))
  import testrunner
  
  ACCEPTED_ERROR = 20
  
  
  def testfunc(child):
      child.expect(r"Testing generic evtimer \(start time = (\d+) ms\)")
      timer_offset = int(child.match.group(1))
      child.expect(r"Are the reception times of all (\d+) msgs close to the supposed values?")
      numof = int(child.match.group(1))
  
      for i in range(numof):
          child.expect(r'At \s*(\d+) ms received msg %i: "supposed to be (\d+)"' % i)
          # check if output is correct
          exp = int(child.match.group(2)) + timer_offset
          assert(int(child.match.group(1)) in range(exp - ACCEPTED_ERROR, exp + ACCEPTED_ERROR + 1))
          print(".", end="", flush=True)
      print("")
      print("All tests successful")
  
  if __name__ == "__main__":
      sys.exit(testrunner.run(testfunc, echo=False))
  
subject: fix F841 local variable 'stop' is assigned to but never used