#!/usr/bin/env python3

from dateutil import rrule
import sys, getopt
import datetime

#start_date = datetime.datetime.strptime('5/20/2019', '%m/%d/%Y')
#end_date = datetime.datetime.strptime('7/14/2019', '%m/%d/%Y')

def main(argv):
   start_date = ''
   end_date = ''
   try:
      opts, args = getopt.getopt(argv,"hs:e:",["sdate=","edate="])
   except getopt.GetoptError:
      print ('datecalc -s <start_date> -e <end_date>')
      sys.exit(2)
   for opt, arg in opts:
      if opt == '-h':
         print ('datecalc -s <start date> -e <end date>')
         sys.exit()
      elif opt in ("-s", "--sdate"):
         start_date = datetime.datetime.strptime(arg, '%m/%d/%Y')
      elif opt in ("-e", "--edate"):
         end_date = datetime.datetime.strptime(arg, '%m/%d/%Y')
   weeks=rrule.rrule(rrule.WEEKLY, dtstart=start_date, until=end_date)
   print ('This course is: ', weeks.count(), ' Week Long')

if __name__ == "__main__":
   main(sys.argv[1:])