old_contents: """
  Russian-specific forms helpers
  """
  from __future__ import absolute_import, unicode_literals
  
  import re
  
  from django.contrib.localflavor.ru.ru_regions import RU_COUNTY_CHOICES, RU_REGIONS_CHOICES
  from django.forms.fields import RegexField, Select
  from django.utils.translation import ugettext_lazy as _
  
  
  phone_digits_re = re.compile(r'^(?:[78]-?)?(\d{3})[-\.]?(\d{3})[-\.]?(\d{4})$')
  
  class RUCountySelect(Select):
      """
      A Select widget that uses a list of Russian Counties as its choices.
      """
      def __init__(self, attrs=None):
          super(RUCountySelect, self).__init__(attrs, choices=RU_COUNTY_CHOICES)
  
  
  class RURegionSelect(Select):
      """
      A Select widget that uses a list of Russian Regions as its choices.
      """
      def __init__(self, attrs=None):
          super(RURegionSelect, self).__init__(attrs, choices=RU_REGIONS_CHOICES)
  
  
  class RUPostalCodeField(RegexField):
      """
      Russian Postal code field.
      Format: XXXXXX, where X is any digit, and first digit is not zero.
      """
      default_error_messages = {
          'invalid': _('Enter a postal code in the format XXXXXX.'),
      }
      def __init__(self, max_length=None, min_length=None, *args, **kwargs):
          super(RUPostalCodeField, self).__init__(r'^\d{6}$',
              max_length, min_length, *args, **kwargs)
  
  
  class RUPassportNumberField(RegexField):
      """
      Russian internal passport number format:
      XXXX XXXXXX where X - any digit.
      """
      default_error_messages = {
          'invalid': _('Enter a passport number in the format XXXX XXXXXX.'),
      }
      def __init__(self, max_length=None, min_length=None, *args, **kwargs):
          super(RUPassportNumberField, self).__init__(r'^\d{4} \d{6}$',
              max_length, min_length, *args, **kwargs)
  
  
  class RUAlienPassportNumberField(RegexField):
      """
      Russian alien's passport number format:
      XX XXXXXXX where X - any digit.
      """
      default_error_messages = {
          'invalid': _('Enter a passport number in the format XX XXXXXXX.'),
      }
      def __init__(self, max_length=None, min_length=None, *args, **kwargs):
          super(RUAlienPassportNumberField, self).__init__(r'^\d{2} \d{7}$',
              max_length, min_length, *args, **kwargs)
  
new_contents: """
  Russian-specific forms helpers
  """
  from __future__ import absolute_import, unicode_literals
  
  import re
  
  from django_localflavor_ru.ru_regions import RU_COUNTY_CHOICES, RU_REGIONS_CHOICES
  from django.forms.fields import RegexField, Select
  from django.utils.translation import ugettext_lazy as _
  
  
  phone_digits_re = re.compile(r'^(?:[78]-?)?(\d{3})[-\.]?(\d{3})[-\.]?(\d{4})$')
  
  class RUCountySelect(Select):
      """
      A Select widget that uses a list of Russian Counties as its choices.
      """
      def __init__(self, attrs=None):
          super(RUCountySelect, self).__init__(attrs, choices=RU_COUNTY_CHOICES)
  
  
  class RURegionSelect(Select):
      """
      A Select widget that uses a list of Russian Regions as its choices.
      """
      def __init__(self, attrs=None):
          super(RURegionSelect, self).__init__(attrs, choices=RU_REGIONS_CHOICES)
  
  
  class RUPostalCodeField(RegexField):
      """
      Russian Postal code field.
      Format: XXXXXX, where X is any digit, and first digit is not zero.
      """
      default_error_messages = {
          'invalid': _('Enter a postal code in the format XXXXXX.'),
      }
      def __init__(self, max_length=None, min_length=None, *args, **kwargs):
          super(RUPostalCodeField, self).__init__(r'^\d{6}$',
              max_length, min_length, *args, **kwargs)
  
  
  class RUPassportNumberField(RegexField):
      """
      Russian internal passport number format:
      XXXX XXXXXX where X - any digit.
      """
      default_error_messages = {
          'invalid': _('Enter a passport number in the format XXXX XXXXXX.'),
      }
      def __init__(self, max_length=None, min_length=None, *args, **kwargs):
          super(RUPassportNumberField, self).__init__(r'^\d{4} \d{6}$',
              max_length, min_length, *args, **kwargs)
  
  
  class RUAlienPassportNumberField(RegexField):
      """
      Russian alien's passport number format:
      XX XXXXXXX where X - any digit.
      """
      default_error_messages = {
          'invalid': _('Enter a passport number in the format XX XXXXXXX.'),
      }
      def __init__(self, max_length=None, min_length=None, *args, **kwargs):
          super(RUAlienPassportNumberField, self).__init__(r'^\d{2} \d{7}$',
              max_length, min_length, *args, **kwargs)
  
subject: Update forms.py