old_contents: from django.db import models
  from tardis.tardis_portal.models import Facility
  
  
  class Instrument(models.Model):
      '''
      Represents an instrument belonging to a facility that produces data
      '''
      name = models.CharField(max_length=100, unique=True)
      facility = models.ForeignKey(Facility)
  
      class Meta:
          app_label = 'tardis_portal'
          verbose_name_plural = 'Instruments'
  
      def __unicode__(self):
          return self.name
  
      def getParameterSets(self, schemaType=None):
          '''Return the instrument parametersets associated with this
          instrument.
  
          '''
          from tardis.tardis_portal.models.parameters import Schema
          if schemaType == Schema.INSTRUMENT or schemaType is None:
              return self.instrumentparameterset_set.filter(
                  schema__type=Schema.INSTRUMENT)
          else:
              raise Schema.UnsupportedType
  
      def _has_change_perm(self, user_obj):
          """
          Instrument objects should only be modified by members of the facility
          managers group.
          """
          return self.facility.manager_group in user_obj.groups.all()
new_contents: from django.db import models
  from tardis.tardis_portal.models import Facility
  
  
  class Instrument(models.Model):
      '''
      Represents an instrument belonging to a facility that produces data
      '''
      name = models.CharField(max_length=100, unique=True)
      facility = models.ForeignKey(Facility)
  
      class Meta:
          app_label = 'tardis_portal'
          verbose_name_plural = 'Instruments'
  
      def __unicode__(self):
          return self.name
  
      def getParameterSets(self, schemaType=None):
          '''Return the instrument parametersets associated with this
          instrument.
  
          '''
          from tardis.tardis_portal.models.parameters import Schema
          if schemaType == Schema.INSTRUMENT or schemaType is None:
              return self.instrumentparameterset_set.filter(
                  schema__type=Schema.INSTRUMENT)
          else:
              raise Schema.UnsupportedType
  
      def _has_change_perm(self, user_obj):
          """
          Instrument objects should only be modified by members of the facility
          managers group.
          """
          return self.facility.manager_group in user_obj.groups.all()
  
subject: add newline