Add isort.

Fixes #6

Author: Natim

Makefile

@@ -0,0 +1,58 @@
+VIRTUALENV = virtualenv --python=python3
+
+VENV := $(shell echo $${VIRTUAL_ENV-.venv})
+PYTHON = $(VENV)/bin/python
+
+INSTALL_STAMP = $(VENV)/.install.stamp
+DEV_STAMP = $(VENV)/.dev_env_installed.stamp
+TEMPDIR := $(shell mktemp -du)
+
+help:
+	@echo "Please use 'make <target>' where <target> is one of"
+	@echo "  format                      reformat code: black and isort"
+	@echo "  install                     install dependencies and prepare environment"
+	@echo "  install-dev                 install dependencies and everything needed to run tests"
+	@echo "  black                       run the black tool, which will automatically reformat the code"
+	@echo "  isort                       run the isort tool, which will automatically sort all of the imports"
+	@echo "  clean                       remove *.pyc files and __pycache__ directory"
+	@echo "  distclean                   remove *.egg-info files and *.egg, build and dist directories"
+	@echo "  maintainer-clean            remove the .tox and the .venv directories"
+	@echo "Check the Makefile to know exactly what each target is doing."
+
+virtualenv: $(PYTHON)
+$(PYTHON):
+	$(VIRTUALENV) $(VENV)
+
+install: $(INSTALL_STAMP)
+$(INSTALL_STAMP): $(PYTHON) setup.py requirements.txt
+	$(VENV)/bin/pip install -U pip
+	$(VENV)/bin/pip install -Ue . -c requirements.txt
+	touch $(INSTALL_STAMP)
+
+install-dev: $(INSTALL_STAMP) $(DEV_STAMP)
+$(DEV_STAMP): $(PYTHON) dev-requirements.txt
+	$(VENV)/bin/pip install -Ur dev-requirements.txt
+	touch $(DEV_STAMP)
+
+format: black isort
+
+black: install-dev
+	$(VENV)/bin/black setup.py alma
+
+isort: install-dev
+	$(VENV)/bin/isort setup.py alma
+
+build-requirements:
+	$(VIRTUALENV) $(TEMPDIR)
+	$(TEMPDIR)/bin/pip install -U pip
+	$(TEMPDIR)/bin/pip install -Ue .
+	$(TEMPDIR)/bin/pip freeze | grep -v -- '-e' > requirements.txt
+
+clean:
+	find . -name '__pycache__' -type d | xargs rm -fr
+
+distclean: clean
+	rm -fr *.egg *.egg-info/ dist/ build/
+
+maintainer-clean: distclean
+	rm -fr .venv/ .tox/

dev-requirements.txt

@@ -0,0 +1,2 @@
+black
+isort

requirements.txt

@@ -0,0 +1,5 @@
+certifi==2019.11.28
+chardet==3.0.4
+idna==2.8
+requests==2.22.0
+urllib3==1.25.8

setup.py

@@ -1,5 +1,6 @@
 import pathlib
-from setuptools import setup, find_packages
+
+from setuptools import find_packages, setup
 
 # The directory containing this file
 HERE = pathlib.Path(__file__).parent