marshmallow

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

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Steven Loria

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Jérôme Lafréc...

Admin

Gorgias

sponsor

$5,300 USD

Dash Hudson

$1,250 USD

Fern

sponsor

$1,046 USD

Route4Me Rout...

sponsor

$700 USD

Triplebyte

backer

$530 USD

Michael Fowlie

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$500 USD

Brian Grohe

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$325 USD

Grey Li

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$230 USD

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marshmallow development (2025/01)

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News from marshmallow

Updates on our activities and progress.

Marshmallow news

Dear contributors. Two years have passed since our last news here so we figured it was time to provide an update. After the important changes made for marshmallow 3, we wanted to keep it stable for a while. We have been introducing new feat...

Published on January 13, 2022 by Jérôme Lafréchoux

webargs 6.0.0 release

webargs 6.0.0 is the result of an important refactor.The new "one location per schema" approach unlocks the use of schema-level features such as pre/post processors or dealing with unknown fields.We also dropped Python 2 and moved from F...

Published on February 27, 2020 by Jérôme Lafréchoux

marshmallow 3.0.0 released

v3 is here!Some of the major changes:Python 3 onlyStrictness by default: no more strict mode; `load` and `dump` return dataUnknown field validationMore intuitive datetime handlingImproved Dict field with support for semi-structured dataG...

Published on August 18, 2019 by Steven Loria

About

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

This collective funds the development of marshmallow and other projects in the marshmallow-code organization, including:

apispec - A pluggable API specification generator that targets the OpenAPI standard
webargs - A declarative request parsing library
marshmallow-jsonapi - JSON API formatting and validation with marshmallow
marshmallow-sqlalchemy - SQLAlchemy integration with marshmallow
flask-marshmallow - Flask extension for marshmallow

Our team

Steven Loria

Admin

Jérôme Lafréc...

Admin