Add Makefile, black, reformat with black

Makefile

@@ -0,0 +1,55 @@
+NAME := redis_developer
+INSTALL_STAMP := .install.stamp
+POETRY := $(shell command -v poetry 2> /dev/null)
+
+.DEFAULT_GOAL := help
+
+.PHONY: help
+help:
+	@echo "Please use 'make <target>' where <target> is one of"
+	@echo ""
+	@echo "  install     install packages and prepare environment"
+	@echo "  clean       remove all temporary files"
+	@echo "  lint        run the code linters"
+	@echo "  format      reformat code"
+	@echo "  test        run all the tests"
+	@echo "  shell       open a Poetry shell"
+	@echo ""
+	@echo "Check the Makefile to know exactly what each target is doing."
+
+install: $(INSTALL_STAMP)
+$(INSTALL_STAMP): pyproject.toml poetry.lock
+	@if [ -z $(POETRY) ]; then echo "Poetry could not be found. See https://python-poetry.org/docs/"; exit 2; fi
+	$(POETRY) install
+	touch $(INSTALL_STAMP)
+
+.PHONY: clean
+clean:
+	find . -type d -name "__pycache__" | xargs rm -rf {};
+	rm -rf $(INSTALL_STAMP) .coverage .mypy_cache
+
+.PHONY: lint
+lint: $(INSTALL_STAMP)
+	$(POETRY) run isort --profile=black --lines-after-imports=2 ./tests/ $(NAME)
+	$(POETRY) run black ./tests/ $(NAME)
+	$(POETRY) run flake8 --ignore=W503,E501,F401,E731 ./tests/ $(NAME)
+	$(POETRY) run mypy ./tests/ $(NAME) --ignore-missing-imports
+	$(POETRY) run bandit -r $(NAME) -s B608
+
+.PHONY: format
+format: $(INSTALL_STAMP)
+	$(POETRY) run isort --profile=black --lines-after-imports=2 ./tests/ $(NAME)
+	$(POETRY) run black ./tests/ $(NAME)
+
+.PHONY: test
+test: $(INSTALL_STAMP)
+	#$(POETRY) run pytest ./tests/ --cov-report term-missing --cov-fail-under 100 --cov $(NAME)
+	$(POETRY) run pytest ./tests/
+
+.PHONY: shell
+shell: $(INSTALL_STAMP)
+	$(POETRY) shell
+
+.PHONY: redis
+redis:
+	docker-compose up -d