remove __pycache__ and *.pyc

setup.cfg

@@ -132,6 +132,10 @@ deps =
 	{[options]install_requires}
 	{[options.extras_require]test}
 extras = test
+whitelist_externals = rm
+commands_pre =
+    rm -rf **/__pycache__
+    rm -rf **/*.pyc
 commands = 
 	pytest \
 	--cov={[metadata]name} \