Data table feature not supported in charts
Created originally on Bitbucket by yukibo (yukibo Bobo Bo Bobo)
When writing to a worksheet that contains charts with data tables, those data tables dissapear because the use of data tables seems not to be supported by openpyxl at the moment.
Using openpyxl 2.5.0a3 , can be reproduced by opening a simple worksheet with one graph containing a data table, then writing to the file.