**marshmallow** is an ORM/ODM/framework-agnostic library for converting complex datatypes, such as objects, to and from native Python datatypes. .. code-block:: python from datetime import date from marshmallow import Schema, fields, pprint class ArtistSchema(Schema): name = fields.Str() class AlbumSchema(Schema): title = fields.Str() release_date = fields.Date() artist = fields.Nested(ArtistSchema) bowie = dict(name='David Bowie') album = dict(artist=bowie, title='Hunky Dory', release_date=date(1971, 12, 17)) schema = AlbumSchema() result = schema.dump(album) pprint(result.data, indent=2) # { 'artist': {'name': 'David Bowie'}, # 'release_date': '1971-12-17', # 'title': 'Hunky Dory'} In short, marshmallow schemas can be used to: - **Validate** input data. - **Deserialize** input data to app-level objects. - **Serialize** app-level objects to primitive Python types. The serialized objects can then be rendered to standard formats such as JSON for use in an HTTP API. Get It Now ========== .. code-block:: bash $ pip install -U marshmallow Ready to get started? Go on to the :ref:`Quickstart tutorial <quickstart>` or check out some :ref:`Examples <examples>`.