Update debug statement

docs/source/conf.py

@@ -28,7 +28,7 @@ sys.modules.update((mod_name, Mock()) for mod_name in MOCK_MODULES)
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
 sys.path.insert(0, os.path.abspath('../../skabase'))
-print "$PYTHONPATH: ", os.environ['PYTHONPATH']
+print(os.environ['PYTHONPATH'])
 # -- General configuration ------------------------------------------------
 
 # If your documentation needs a minimal Sphinx version, state it here.