Run black linter and enforce going forward

.travis.yml

@@ -37,7 +37,8 @@ install:
     python wait_for.py
   fi
 script:
-- make test
+- make test-only
+- if [[ $TRAVIS_PYTHON_VERSION == "3.7" ]]; then make lint; fi
 after_success:
 - coveralls
 before_deploy:

Makefile

@@ -14,12 +14,16 @@ init:
 
 lint:
 	flake8 moto
+	black --check moto/ tests/
 
-test: lint
+test-only:
 	rm -f .coverage
 	rm -rf cover
 	@nosetests -sv --with-coverage --cover-html ./tests/ $(TEST_EXCLUDE)
 
+
+test: lint test-only
+
 test_server:
 	@TEST_SERVER_MODE=true nosetests -sv --with-coverage --cover-html ./tests/
 

README.md

@@ -7,9 +7,9 @@
 [![Docs](https://readthedocs.org/projects/pip/badge/?version=stable)](http://docs.getmoto.org)
 ![PyPI](https://img.shields.io/pypi/v/moto.svg)
 ![PyPI - Python Version](https://img.shields.io/pypi/pyversions/moto.svg)
-![PyPI - Downloads](https://img.shields.io/pypi/dw/moto.svg)
+![PyPI - Downloads](https://img.shields.io/pypi/dw/moto.svg) [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
 
-# In a nutshell
+## In a nutshell
 
 Moto is a library that allows your tests to easily mock out AWS Services.
 

requirements-dev.txt

@@ -1,6 +1,7 @@
 -r requirements.txt
 mock
 nose
+black; python_version >= '3.6'
 sure==1.4.11
 coverage
 flake8==3.7.8

tox.ini

@@ -15,5 +15,5 @@ commands =
     nosetests {posargs}
 
 [flake8]
-ignore = E128,E501,W504,W605
+ignore = W503,W605,E128,E501,E203,E266,E501,E231
 exclude = moto/packages,dist