{"text_format":"3","workbook":"xlsx","n_sheets":2,"sheets":["Chart1","Sheet1"],"not_rendered":{"charts":2},"unopened":[{"sheet":"Chart1","index":0,"reason":"not_a_worksheet"}],"read":"whole","date_system":"1900"}

{"sheet":"Sheet1","index":1,"n_rows":13,"n_cols":2,"rows_kept":13}
["Month","Sales"]
["2015-01-01",123]
["2015-02-01",5414]
["2015-03-01",56]
["2015-04-01",154]
["2015-05-01",5456]
["2015-06-01",578]
["2015-07-01",14]
["2015-08-01",789]
["2015-09-01",4145]
["2015-10-01",124]
["2015-11-01",305]
["2015-12-01",1354]