Took me a while to get it, so I'm attaching code for future searches:
from openpyxl.worksheet.views import SheetView
book = load_workbook(steps_filename)
for eachSheet in book.worksheets:
eachSheet.sheet_view.rightToLeft=True
Ariel
בתאריך יום רביעי, 30 במאי 2018 בשעה 10:21:39 UTC+3, מאת Charlie Clark: