old_contents: from django.core.exceptions import ValidationError
  from django.utils.translation import ugettext as _
  import re
  
  class ComplexPasswordValidator(object):
  
      def validate(self, password, user=None):
          regex = '(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[$@$!%*?&])[A-Za-z\d$@$!%*?&]'
          if not re.match(regex, password):
               raise ValidationError(_('Password should contain uppercase, lowercase and numeric values and at least'
                                       'one of the following $@$!%*?&'), code='password_is_weak')
  
      def get_help_text(self):
           return _('Password should contain uppercase, lowercase and numeric values and at least '
                    'one of the following $@$!%*?&')
  
new_contents: from django.core.exceptions import ValidationError
  from django.utils.translation import ugettext as _
  import re
  
  class ComplexPasswordValidator(object):
  
      def validate(self, password, user=None):
          regex = '(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[$@$!%*?&])[A-Za-z\d$@$!%*?&]'
          if not re.match(regex, password):
               raise ValidationError(_('Password should contain uppercase, lowercase, numeric values and at least '
   +                                   'one of the following $@$!%*?&'), code='password_is_weak')
  
      def get_help_text(self):
           return _('Password should contain uppercase, lowercase, numeric values and at least '
   +                'one of the following $@$!%*?&')
  
subject: fix message