old_contents: # encoding: utf-8
  
  """
  .. codeauthor:: Tsuyoshi Hombashi <tsuyoshi.hombashi@gmail.com>
  """
  
  from __future__ import absolute_import
  from __future__ import print_function
  
  from subprocrunner import SubprocessRunner
  from typepy.type import RealNumber
  
  from tcconfig._const import Tc
  from tcconfig._converter import Humanreadable
  
  
  def is_invalid_param(
          rate, delay, packet_loss, packet_duplicate, corrupt, reordering):
      param_value_list = [
          delay,
          packet_loss,
          packet_duplicate,
          corrupt,
          reordering,
      ]
  
      print(param_value_list)
  
      is_invalid = all([
          not RealNumber(param_value).is_type() or param_value <= 0
          for param_value in param_value_list
      ])
  
      try:
          Humanreadable(rate, kilo_size=1000).to_bit()
      except (TypeError, ValueError):
          pass
      else:
          is_invalid = False
  
      return is_invalid
  
  
  def execute_tcdel(device):
      SubprocessRunner(
          "{:s} --device {}".format(Tc.Command.TCDEL, device),
          dry_run=False).run()
  
new_contents: # encoding: utf-8
  
  """
  .. codeauthor:: Tsuyoshi Hombashi <tsuyoshi.hombashi@gmail.com>
  """
  
  from __future__ import absolute_import
  from __future__ import print_function
  
  from subprocrunner import SubprocessRunner
  from typepy.type import RealNumber
  
  from tcconfig._const import Tc
  from tcconfig._converter import Humanreadable
  
  
  def is_invalid_param(
          rate, delay, packet_loss, packet_duplicate, corrupt, reordering):
      param_value_list = [
          delay,
          packet_loss,
          packet_duplicate,
          corrupt,
          reordering,
      ]
  
      print(param_value_list)
  
      is_invalid = all([
          not RealNumber(param_value).is_type() or param_value <= 0
          for param_value in param_value_list
      ])
  
      try:
          Humanreadable(rate, kilo_size=1000).to_bit()
      except (TypeError, ValueError):
          pass
      else:
          is_invalid = False
  
      return is_invalid
  
  
  def execute_tcdel(device):
      SubprocessRunner(
          "{:s} --device {} --all".format(Tc.Command.TCDEL, device),
          dry_run=False).run()
  
subject: Modify test tear down function