A python microservice framework


Get started
Write an API specification
Implement your API
Deploy to AWS
JWT authentication
Error handling
Asynchronous execution
Database serialisation


pymacaron is a python microservice framework based on Flask, OpenAPI, docker and AWS/beanstalk.

File structure of a PyMacaron microservice

A REST api microservice built with pymacaron has a directory tree looking like this:

|   # apis/ contains the swagger specifications of your
|   # microservice apis
├── apis
│   └── myservice.yaml
│   └── sendgrid.yaml
│   └── auth0.yaml
|   # Implementation of your api's endpoints
├── myservice
│   └──
├── LICENSE           # Always have a licence :-)
├── README.rst        # and a readme!
├── pym-config.yaml   # PyMacaron settings
├──         # Your API server
├── requirements.txt  # Your python dependencies
└── test              # Unitests, executed with nosetests
|   └──
|   # Acceptance tests for your api,
|   # executed with run_acceptance_tests
└── testaccept

Core features

API specifications

At the core of pymacaron lies your API specifications, in the form of yaml files following the OpenAPI/swagger standard.

Those API specifications describe every endpoint in your microservice API, the data they accept as parameters and return as results, and define all the objects used in your API.

pymacaron-core extends the standard OpenAPI format to let you bind API endpoints to python methods, add JWT-based authentication to chosen endpoints, or handle serialisation of some data objects to databases.

pymacaron-core uses your API specifications to start a Flask server and populate it with routes for each of your API endpoints.

More details here.

JWT authentication

You can add authentication around API endpoints in a PyMacaron microservice by using PyMacaron’s built-in support for JWT tokens. More details here.

Pluggable features

By itself, pymacaron only lets you build a REST microservice and run it as a local server.

The following plugins may be used for additional features:

Deployment pipeline

PyMacaron microservices come with a ready-to-use deployment pipeline that packages the service as a docker image and deploys it on Amazon Elastic Beanstalk with little configuration required.

This deployment pipeline is implemented in pymacaron-aws. More details here.

Asynchronous task execution

pymacaron-async adds support for asynchronous task execution to your API endpoints. More details here.

Blackbox testing framework

pymacaron-unit is a unittesting library to write blackbox tests targeting your API endpoints. More details here.