Ask HN: command-line utils for manipulating ODF spreadsheets?

My goal: to have a (bash) script be able to update a cell or range of cells in an existing ODF spreadsheet. To accomplish this goal I've been looking for a GNU-esque command-line tool that basically takes as arguments the file, cell ranges, and data, and does the update. There do seem to be plenty of ODF converters, both in command-line and library form (e.g. http://opendocumentfellowship.com/resources/dev_tools), and ODFPY (http://opendocumentfellowship.com/development/projects/odfpy) allows manipulation of documents, but it's at too low a level of abstraction for my needs. So far I haven't found a tool that does what I need out-of-the-box, but I'm sure there must be other people out there who would find this useful. Does anybody know of any tools that do this? I could write one on top of ODFPY but it would save me some trouble if somebody can suggest a faster way to get the job done.