Skip to main content

A lightweight library for converting complex datatypes to and from native Python datatypes.

Project description

Latest version Travis-CI Documentation

marshmallow is an ORM/ODM/framework-agnostic library for converting complex datatypes, such as objects, to and from native Python datatypes.

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

$ pip install -U marshmallow

Documentation

Full documentation is available at http://marshmallow.readthedocs.io/ .

Requirements

  • Python >= 2.6 or >= 3.4

marshmallow has no external dependencies outside of the Python standard library, although python-dateutil is recommended for robust datetime deserialization.

Ecosystem

A list of marshmallow-related libraries can be found at the GitHub wiki here:

https://github.com/marshmallow-code/marshmallow/wiki/Ecosystem

Credits

Contributors

This project exists thanks to all the people who contribute.

You’re highly encouraged to participate in marshmallow’s development. Check out the Contributing Guidelines to see how you can help.

Thank you to all who have already contributed to marshmallow!

Contributors

Backers

If you find marshmallow useful, please consider supporting the team with a donation. Your donation helps move marshmallow forward.

Thank you to all our backers! [Become a backer]

Backers

Sponsors

Support this project by becoming a sponsor (or ask your company to support this project by becoming a sponsor). Your logo will show up here with a link to your website. [Become a sponsor]

Sponsors

Professional support

Professionally-supported marshmallow is now available through the Tidelift Subscription.

Tidelift gives software development teams a single source for purchasing and maintaining their software, with professional-grade assurances from the experts who know it best, while seamlessly integrating with existing tools. [Get professional support]

Get supported marshmallow with Tidelift

License

MIT licensed. See the bundled LICENSE file for more details.

Project details


Release history Release notifications

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Filename, size & hash SHA256 hash help File type Python version Upload date
marshmallow-2.16.3-py2.py3-none-any.whl (49.3 kB) Copy SHA256 hash SHA256 Wheel py2.py3
marshmallow-2.16.3.tar.gz (149.2 kB) Copy SHA256 hash SHA256 Source None

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN SignalFx SignalFx Supporter DigiCert DigiCert EV certificate StatusPage StatusPage Status page