serializer.py

from StringIO import StringIO

from django.core.serializers.python import Serializer as PythonSerializer
from django.core.serializers.python import Deserializer as PythonDeserializer
import plistlib

try:
    import decimal
except ImportError:
    from django.utils import _decimal as decimal    # Python 2.3 fallback

class Serializer(PythonSerializer):
    """
    Convert a queryset to Plist.
    """
    internal_use_only = False

    def end_serialization(self):
        self.options.pop('stream', None)
        self.options.pop('fields', None)
        self.options.pop('use_natural_keys', None)
        
        plistlib.writePlist(self.objects, self.stream)

    def getvalue(self):
        if callable(getattr(self.stream, 'getvalue', None)):
            return self.stream.getvalue()

def Deserializer(stream_or_string, **options):
    """
    Deserialize a stream or string of Plist data.
    """
    if isinstance(stream_or_string, basestring):
        o = plistlib.readPlistFromString(stream_or_string)
    else:
        o = plistlib.readPlist(stream_or_string)
    for obj in PythonDeserializer(o, **options):
        yield obj