Binary package “python3-flask-marshmallow” in ubuntu oracular

Flask + marshmallow for beautiful APIs (Python3)

 Flask-Marshmallow is a thin integration layer for Flask (a Python web
 framework) and marshmallow (an object serialization/deserialization library)
 that adds additional features to marshmallow, including URL and Hyperlinks
 fields for HATEOAS-ready APIs.
 .
 It also (optionally) integrates with Flask-SQLAlchemy.