pip install marshmallow==3.14.0

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

Source
Among top 1000 packages on PyPI.
Over 29.1M downloads in the last 90 days.

Commonly used with marshmallow

Based on how often these packages appear together in public requirements.txt files on GitHub.

flask-marshmallow

Flask + marshmallow for beautiful APIs

marshmallow-sqlalchemy

SQLAlchemy integration with the marshmallow (de)serialization library

SQLAlchemy-Utils

Various utility functions for SQLAlchemy.

webargs

Declarative parsing and validation of HTTP request objects, with built-in support for popular web frameworks, including Flask, Django, Bottle, Tornado, Pyramid, webapp2, Falcon, and aiohttp.

Flask-JWT

JWT token authentication for Flask apps

Flask-JWT-Extended

Extended JWT integration with Flask

flask-swagger-ui

Swagger UI blueprint for Flask

Flask-Testing

Unit testing for Flask

python-editor

Programmatically open an editor, capture the result.

Flask-Limiter

Rate limiting for flask applications

flask-talisman

HTTP security headers for Flask.

marshmallow-jsonapi

JSON API 1.0 (https://jsonapi.org) formatting with marshmallow

Flask-Caching

Adds caching support to your Flask application

apispec

A pluggable API specification generator. Currently supports the OpenAPI Specification (f.k.a. the Swagger specification).

flask-restplus

Fully featured framework for fast, easy and documented API development with Flask

coolname

Random name and slug generator

pytest-flask

A set of py.test fixtures to test Flask applications.

aniso8601

A library for parsing ISO 8601 strings.

Flask-RESTful

Simple framework for creating REST APIs

Version usage of marshmallow

Proportion of downloaded versions in the last 3 months (only versions over 1%).

3.13.0

38.88%

2.21.0

16.23%

3.14.0

11.31%

3.0.0rc4

5.81%

3.7.1

4.37%

2.16.3

3.09%

3.8.0

2.34%

3.10.0

2.34%

3.12.1

2.31%

2.19.5

2.13%

3.11.1

1.38%

3.3.0

1.08%