I haven't saved shapes but I would think you would want the x,y location, the name of the shape, text if you are using it.. I am generating shapes from text files in my dex tracker project but I haven't reversed it yet to saving them back to a file. It can be done as a text file to make it easier for the user to hack or build new programs for the data.
I am kinda stuck for now because I used the example program that executes run.py and then a program called tracker.py and it doesn't seem to work well when called from another program.. I am told this is a simple project (on the list) so I put it up for bid on rentacoder (searching python will make the bid request come up... I am also willing to barter and create a format and read and write routines for you
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