MangoEngine v1.0.0-rc.2

MangoEngine is a lightweight library for creating generic data models in Python.

class City(Model):
    name = StringField()
    officials = DictField(
        of_key = StringField(),
        of_value = StringField()
    )
    population = IntegerField(bounds = (0, None))

The models you create with MangoEngine are self-documenting and simple to create. Even better, you can populate them from unreliable sources and validate them to ensure your data is sane.

>>> city = City.from_dict({
...     "name": 12,
...     "officials": {1: 2},
...     "population": "alot"
... })
>>> city.validate()
ValidationError: For field 'name': expecting instance of basestring, got int.

You can leverage this library to create your own light-weight ORM for your application regardless of what your backing store is, without abstracting away important details like queries.