old_contents: import json
  import six
  
  from django.core.exceptions import ValidationError
  from django.db import models
  
  try:
      from django.utils.encoding import smart_unicode as smart_text
      smart_text  # placate pyflakes
  except ImportError:
      from django.utils.encoding import smart_text
  
  
  class BaseJSONField(models.TextField):
      """Simple JSON field that stores python structures as JSON strings
      on database.
      """
  
      def __init__(self, *args, **kwargs):
          kwargs.setdefault('default', '{}')
          super(BaseJSONField, self).__init__(*args, **kwargs)
  
      def to_python(self, value):
          """
          Convert the input JSON value into python structures, raises
          django.core.exceptions.ValidationError if the data can't be converted.
          """
          if self.blank and not value:
              return {}
          value = value or '{}'
          if isinstance(value, six.binary_type):
              value = six.text_type(value, 'utf-8')
          if isinstance(value, six.string_types):
              try:
                  return json.loads(value)
              except Exception as err:
                  raise ValidationError(str(err))
          else:
              return value
  
      def validate(self, value, model_instance):
          """Check value is a valid JSON string, raise ValidationError on
          error."""
          if isinstance(value, six.string_types):
              super(JSONField, self).validate(value, model_instance)
              try:
                  json.loads(value)
              except Exception as err:
                  raise ValidationError(str(err))
  
      def get_prep_value(self, value):
          """Convert value to JSON string before save"""
          try:
              return json.dumps(value)
          except Exception as err:
              raise ValidationError(str(err))
  
      def value_to_string(self, obj):
          """Return value from object converted to string properly"""
          return smart_text(self.get_prep_value(self._get_val_from_obj(obj)))
  
      def value_from_object(self, obj):
          """Return value dumped to string."""
          return self.get_prep_value(self._get_val_from_obj(obj))
  
  
  JSONField = models.SubfieldBase('JSONField', (BaseJSONField,), {})
  
  
  try:
      from south.modelsinspector import add_introspection_rules
      add_introspection_rules(
          [],
          ["^social\.apps\.django_app\.default\.fields\.JSONField"]
      )
  except:
      pass
  
new_contents: import json
  import six
  
  from django.core.exceptions import ValidationError
  from django.db import models
  
  try:
      from django.utils.encoding import smart_unicode as smart_text
      smart_text  # placate pyflakes
  except ImportError:
      from django.utils.encoding import smart_text
  
  
  class BaseJSONField(models.TextField):
      """Simple JSON field that stores python structures as JSON strings
      on database.
      """
      def __init__(self, *args, **kwargs):
          kwargs.setdefault('default', '{}')
          super(BaseJSONField, self).__init__(*args, **kwargs)
  
      def to_python(self, value):
          """
          Convert the input JSON value into python structures, raises
          django.core.exceptions.ValidationError if the data can't be converted.
          """
          if self.blank and not value:
              return {}
          value = value or '{}'
          if isinstance(value, six.binary_type):
              value = six.text_type(value, 'utf-8')
          if isinstance(value, six.string_types):
              try:
                  return json.loads(value)
              except Exception as err:
                  raise ValidationError(str(err))
          else:
              return value
  
      def validate(self, value, model_instance):
          """Check value is a valid JSON string, raise ValidationError on
          error."""
          if isinstance(value, six.string_types):
              super(JSONField, self).validate(value, model_instance)
              try:
                  json.loads(value)
              except Exception as err:
                  raise ValidationError(str(err))
  
      def get_prep_value(self, value):
          """Convert value to JSON string before save"""
          try:
              return json.dumps(value)
          except Exception as err:
              raise ValidationError(str(err))
  
      def value_to_string(self, obj):
          """Return value from object converted to string properly"""
          return smart_text(self.get_prep_value(self._get_val_from_obj(obj)))
  
      def value_from_object(self, obj):
          """Return value dumped to string."""
          return self.get_prep_value(self._get_val_from_obj(obj))
  
  
  JSONField = models.SubfieldBase('JSONField', (BaseJSONField,), {})
  
  
  try:
      from south.modelsinspector import add_introspection_rules
      add_introspection_rules(
          [],
          ["^social\.apps\.django_app\.default\.fields\.JSONField"]
      )
  except:
      pass
  
subject: Remove empty line