ENH: use meaningful default for access

src/caosadvancedtools/cfood.py

@@ -66,11 +66,14 @@ def get_entity(name):
 
 
 class FileGuide(object):
-    def access(path):
+    def access(self, path):
         """ should be replaced by a function that adds
-        a prefix to paths to allow to access caosdb files locally"""
+        a prefix to paths to allow to access caosdb files locally
 
-        raise NotImplementedError()
+        This default just returns the unchanged path.
+        """
+
+        return path
 
 
 fileguide = FileGuide()