New answers tagged reports
You could use import os myfile = r"C:\temp\test.pdf" os.system("start " + myfile) Just tested running this chunk of code from Python add-in from ArcMap and it works fine. More discussion on using this is here.
It seems that it only provides this functionality if you group by a field, so you need at least 2 fields in your data. So in short, the answer is no. Not the way you want to do it. The main function of the reporting tools is to allow you to summarise data by groups. Below I've tried to outline the process of creating the summary you want using a group. ...
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