import monthdelta as md
import datetime as dt
import math as math

def quarter(month):
    return int(math.ceil(month/3.0))
#end def

d0 = md.date.today()
dates = [d0 + md.monthdelta(i) for i in range(1, 20)]
yyyymms = [d.year*100 + d.month for d in dates]
yymms …