{"text_format":"3","workbook":"xlsx","n_sheets":3,"sheets":["Лист1","Лист2","Лист3"],"read":"whole","date_system":"1900"}

{"sheet":"Лист1","index":0,"n_rows":5,"n_cols":12,"rows_kept":5}
[1,2,3,4,null,"condfmt1",1,2,3,5,6,7]
[{"$nulls":5},4]
[]
[]
[{"$f":"A1","v":1},null,{"$f":"SUM(B1:D1)","v":9}]

{"sheet":"Лист2","index":1,"n_rows":1,"n_cols":1,"rows_kept":1}
[{"$f":"Лист1!A1","v":1}]

{"sheet":"Лист3","index":2,"n_rows":1,"n_cols":1,"rows_kept":1}
[{"$f":"SUM(Лист1:Лист2!A1)","v":2}]