How to find last day of the months in jalali date in python?

Question

from datetime import datetime
from service import jalali
from_date = jalali.Gregorian(date).persian_string("{}/{}/{}")
print(datetime.strptime('1396/4/28', '%Y/%m/%d'))
print(datetime.strptime(from_date, '%Y/%m/%d'))
datetime.datetime(1396, 4, 28, 0, 0)
datetime.datetime(1396, 4, 28, 0, 0)

I expect that show me last days of every months in jalali