[web2py] Uploaded files path discovery

[rdodev]

So, as per documentation, the default upload file location is:
web2py\applications\application_name\uploads however, I'd like to avoid 
hard-coding this path since the app might be deployed in different environs 
and relative paths don't seem to work (i.e. '../uploads/' + file_name') . 
So from a controller is there a more elegant way to get the path? Thx.