--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/django/core/serializers/__init__.py	Wed Jan 20 00:34:04 2010 +0100
@@ -0,0 +1,113 @@
+"""
+Interfaces for serializing Django objects.
+
+Usage::
+
+    from django.core import serializers
+    json = serializers.serialize("json", some_query_set)
+    objects = list(serializers.deserialize("json", json))
+
+To add your own serializers, use the SERIALIZATION_MODULES setting::
+
+    SERIALIZATION_MODULES = {
+        "csv" : "path.to.csv.serializer",
+        "txt" : "path.to.txt.serializer",
+    }
+
+"""
+
+from django.conf import settings
+from django.utils import importlib
+
+# Built-in serializers
+BUILTIN_SERIALIZERS = {
+    "xml"    : "django.core.serializers.xml_serializer",
+    "python" : "django.core.serializers.python",
+    "json"   : "django.core.serializers.json",
+}
+
+# Check for PyYaml and register the serializer if it's available.
+try:
+    import yaml
+    BUILTIN_SERIALIZERS["yaml"] = "django.core.serializers.pyyaml"
+except ImportError:
+    pass
+
+_serializers = {}
+
+def register_serializer(format, serializer_module, serializers=None):
+    """"Register a new serializer. 
+    
+    ``serializer_module`` should be the fully qualified module name
+    for the serializer.
+    
+    If ``serializers`` is provided, the registration will be added
+    to the provided dictionary.
+    
+    If ``serializers`` is not provided, the registration will be made
+    directly into the global register of serializers. Adding serializers
+    directly is not a thread-safe operation.
+    """
+    module = importlib.import_module(serializer_module)
+    if serializers is None:
+        _serializers[format] = module
+    else:
+        serializers[format] = module
+        
+def unregister_serializer(format):
+    "Unregister a given serializer. This is not a thread-safe operation."
+    del _serializers[format]
+
+def get_serializer(format):
+    if not _serializers:
+        _load_serializers()
+    return _serializers[format].Serializer
+
+def get_serializer_formats():
+    if not _serializers:
+        _load_serializers()
+    return _serializers.keys()
+
+def get_public_serializer_formats():
+    if not _serializers:
+        _load_serializers()
+    return [k for k, v in _serializers.iteritems() if not v.Serializer.internal_use_only]
+
+def get_deserializer(format):
+    if not _serializers:
+        _load_serializers()
+    return _serializers[format].Deserializer
+
+def serialize(format, queryset, **options):
+    """
+    Serialize a queryset (or any iterator that returns database objects) using
+    a certain serializer.
+    """
+    s = get_serializer(format)()
+    s.serialize(queryset, **options)
+    return s.getvalue()
+
+def deserialize(format, stream_or_string):
+    """
+    Deserialize a stream or a string. Returns an iterator that yields ``(obj,
+    m2m_relation_dict)``, where ``obj`` is a instantiated -- but *unsaved* --
+    object, and ``m2m_relation_dict`` is a dictionary of ``{m2m_field_name :
+    list_of_related_objects}``.
+    """
+    d = get_deserializer(format)
+    return d(stream_or_string)
+
+def _load_serializers():
+    """
+    Register built-in and settings-defined serializers. This is done lazily so
+    that user code has a chance to (e.g.) set up custom settings without
+    needing to be careful of import order.
+    """
+    global _serializers
+    serializers = {}
+    for format in BUILTIN_SERIALIZERS:
+        register_serializer(format, BUILTIN_SERIALIZERS[format], serializers)
+    if hasattr(settings, "SERIALIZATION_MODULES"):
+        for format in settings.SERIALIZATION_MODULES:
+            register_serializer(format, settings.SERIALIZATION_MODULES[format], serializers)
+    _serializers = serializers