gistfile1.txt

#!/usr/bin/env python3
from datetime import datetime
from dateutil.relativedelta import relativedelta

# in days
RECOMMENDATION_GENERATION_WINDOW = 60
STEPS_TO_REACH_NEXT_MONTH = 32

def adjust_days(date, days, shift_backwards=True):
    if shift_backwards:
        date = date + relativedelta(days=-days)
    else:
        date = date + relativedelta(days=days)
    return date

def replace_days(date, day):
    date = date.replace(day=day)
    return date

if __name__ == "__main__":
    begin_date = datetime.utcnow()
    from_date = adjust_days(begin_date, RECOMMENDATION_GENERATION_WINDOW)

    # shift to the first of month
    from_date = replace_days(from_date, 1)

    parquets = []
    while from_date <= begin_date:
        parquets.append((from_date.year, from_date.month))
        from_date = adjust_days(from_date, STEPS_TO_REACH_NEXT_MONTH, shift_backwards=False)
        from_date = replace_days(from_date, 1)

    print(parquets)