Fix setup.py

setup.py

@@ -1,7 +1,7 @@
 from setuptools import setup, find_packages, Command
 #from codecs import open as open_c
-from os import path, system, remove, rename
-import re
+from os import path, system, remove, rename, removedirs
+import re, shutil
 
 package_name = "pytchat"
 
@@ -13,6 +13,8 @@ def _requirements():
 def _test_requirements():
     return [name.rstrip() for name in open(path.join(root_dir, 'requirements_test.txt')).readlines()]
 
+shutil.rmtree('build/')
+shutil.rmtree('dist/')
 
 with open(path.join(root_dir, package_name, '__init__.py')) as f:
     init_text = f.read()