Apparently there is some discussion somewhere about being able to import from parent directories. Long story short, I think, is that it was deemed that this is a poor way to structure modules, however, for work which contains run scripts in folder within the working directory this would be a useful functionality.
There are two ways to approach this which I have found.
If in a module, then relative paths can be used (python >= 2.5):
This won’t work from a script and so modification to the sys path is a reasonable approach: