Creating GeoDjango model in shell does not work

[drdee]

When you start the shell (python manage.py shell) and paste the following code (pasted from ​http://docs.djangoproject.com/en/dev/ref/contrib/gis/model-api/):

from django.contrib.gis.db import models

class Zipcode(models.Model):

code = models.CharField(max_length=5)
poly = models.PolygonField()
objects = models.GeoManager()

then you receive the following error 'list index out of range'

line 49:kwargs = {"app_label": model_module.name.split('.')[-2]}

the model_module refers to: <module 'main' from '/Library/Python/2.5/site-packages/IPython/FakeModule.pyc'>

This happens with Postgresql 8.4, postgis 1.5.1, OSX 10.5, python 2.5.2