object oriented path handling

python/damask/_colormap.py

@@ -1,3 +1,4 @@
+import os
 import json
 import functools
 

python/setup.py

@@ -1,8 +1,8 @@
 import setuptools
-import os
+from pathlib import Path
 import re
 
-with open(os.path.join(os.path.dirname(__file__),'damask/VERSION')) as f:
+with open(Path(__file__).parent/'damask/VERSION') as f:
   version = re.sub(r'(-([^-]*)).*$',r'.\2',re.sub(r'^v(\d+\.\d+(\.\d+)?)',r'\1',f.readline().strip()))
 
 setuptools.setup(