#$ pip install flask_sqlalchemy #$ pip install flask_marshmallow #$ pip install marshmallow-sqlalchemy
#SQLAlchemy is python SQL toolkit and ORM that gives developer the full power and flexibility of SQL. Where flask-sqlalchemy is flask extension that adds support for SQLAlchemy to flask application(http://flask-sqlalchemy.pocoo.org/2.1/). In other hand flask-marshmallow is flask extension to integrate flask with marshmallow(an object serialization/deserialization library). In this article we use flask-marshmallow to rendered json response.