For Calc

Data to cell

Automatic calculate size range.

def calc_data_to_cell():
    sheet = app.active_sheet
    data = (
        ('Month', 'Total'),
        ('January', 100),
        ('February', 200),
        ('March', 300),
        ('April', 400),
        ('May', 500),
    )
    sheet['A1'].data = data
    return

Copy visible cells

doc = app.active
rangos = doc.active['A1'].current_region.visible
doc.select(rangos)
doc.copy()

doc.active['A15'].select()
doc.paste()

Merge by row

rango = app.selection
rango.merge_by_row()