add makefile which can help test and clean easily with make command

makefile

@@ -0,0 +1,45 @@
+# Env
+export PYTHONDONTWRITEBYTECODE=1
+TEST_PATH=./tests
+DEFAULT_PYTHON2=`python -c "import sys;print(sys.version_info.major)" | grep 2`
+PY2=$(if $(DEFAULT_PYTHON2),python,python2)
+PY3=$(if $(DEFAULT_PYTHON2),python3,python)
+
+# Func
+.PHONY: clean-pyc clean-build
+
+help:
+	@echo $(PYVER)
+	@echo "test"
+	@echo "    Run pytest with Python 2 and 3."
+	@echo "test-py2"
+	@echo "    Run pytest with Python 2."
+	@echo "test-py3"
+	@echo "    Run pytest with Python 3."
+	@echo "clean"
+	@echo "    Remove python and build artifacts."
+	@echo "clean-pyc"
+	@echo "    Remove python artifacts."
+	@echo "clean-build"
+	@echo "    Remove build artifacts."
+
+test: test-py2 test-py3
+
+test-py2: clean-pyc
+	 $(PY2) -m pytest --color=yes $(TEST_PATH)
+
+test-py3: clean-pyc
+	 $(PY3) -m pytest --color=yes $(TEST_PATH)
+
+clean: clean-pyc clean-build
+
+clean-pyc:
+	find . -name '*.pyc' -exec rm -f {} +
+	find . -name '*.pyo' -exec rm -f {} +
+	find . -name '*~' -exec rm -f  {} +
+	find . -name '__pycache__' -exec rm -rf {} +
+
+clean-build:
+	rm -rf build/
+	rm -rf dist/
+	rm -rf *.egg-info