marshmallow: simplified object serialization

Release v0.7.0. (Changelog)

marshmallow is an ORM/ODM/framework-agnostic library for converting complex datatypes, such as objects, into native Python datatypes. The serialized objects can then be rendered to standard formats such as JSON for use in an HTTP API.

from datetime import datetime
from marshmallow import Serializer, fields, pprint

# A "model"
class Person(object):
    def __init__(self, name): = name
        self.date_born =

# A serializer
class PersonSerializer(Serializer):
    name = fields.String()
    date_born = fields.DateTime()

person = Person("Guido van Rossum")
serialized = PersonSerializer(person)
# {"name": "Guido van Rossum", "date_born": "Sun, 10 Nov 2013 14:24:50 -0000"}

Get It Now

$ pip install -U marshmallow

Ready to get started? Go on to the Quickstart tutorial or check out some Examples.

Object serialization, lightweight and fluffy.

Useful Links

Stay Informed

Fork me on GitHub