old_contents: # encoding: utf-8
  
  
  """
  .. codeauthor:: Tsuyoshi Hombashi <tsuyoshi.hombashi@gmail.com>
  """
  
  from __future__ import unicode_literals
  
  from ipaddress import ip_address
  import itertools
  
  import pytest
  import six
  from typepy import (
      Typecode,
      StrictLevel,
  )
  from typepy.type import IpAddress
  
  
  nan = float("nan")
  inf = float("inf")
  
  
  class Test_IpAddress_is_type:
  
      @pytest.mark.parametrize(
          ["value", "strict_level", "expected"],
          list(itertools.product(
              ["",  " ", six.MAXSIZE, str(six.MAXSIZE), inf, nan, None],
              [StrictLevel.MIN, StrictLevel.MAX],
              [False]
          )) + list(itertools.product(
              [
                  "127.0.0.1", "::1",
                  ip_address("127.0.0.1"), ip_address("::1"),
              ],
              [StrictLevel.MIN, StrictLevel.MAX],
              [True],
          )))
      def test_normal(self, value, strict_level, expected):
          type_checker = IpAddress(value, strict_level=strict_level)
  
          assert type_checker.is_type() == expected
          assert type_checker.typecode == Typecode.IP_ADDRESS
  
new_contents: # encoding: utf-8
  
  
  """
  .. codeauthor:: Tsuyoshi Hombashi <tsuyoshi.hombashi@gmail.com>
  """
  
  from __future__ import unicode_literals
  
  from ipaddress import ip_address
  import itertools
  
  import pytest
  import six
  from typepy import (
      Typecode,
      StrictLevel,
  )
  from typepy.type import IpAddress
  
  
  nan = float("nan")
  inf = float("inf")
  
  
  class Test_IpAddress_is_type(object):
  
      @pytest.mark.parametrize(
          ["value", "strict_level", "expected"],
          list(itertools.product(
              ["",  " ", six.MAXSIZE, str(six.MAXSIZE), inf, nan, None],
              [StrictLevel.MIN, StrictLevel.MAX],
              [False]
          )) + list(itertools.product(
              [
                  "127.0.0.1", "::1",
                  ip_address("127.0.0.1"), ip_address("::1"),
              ],
              [StrictLevel.MIN, StrictLevel.MAX],
              [True],
          )))
      def test_normal(self, value, strict_level, expected):
          type_checker = IpAddress(value, strict_level=strict_level)
  
          assert type_checker.is_type() == expected
          assert type_checker.typecode == Typecode.IP_ADDRESS
  
subject: Change class definitions from old style to new style