土日を除いた月末を取得する

last_working_day_of_month.py

#!/usr/bin/env python
#coding: utf-8

import datetime
import workdays
from dateutil import relativedelta

def is_last_working_day_of_month(target_date):
    first_day_of_next_month = target_date + relativedelta.relativedelta(months=1)
    end_of_this_month = datetime.date(first_day_of_next_month.year,
                                      first_day_of_next_month.month,
                                      1)
    return workdays.workday(end_of_this_month, -1, []) == target_date 

def main():
    today = datetime.date.today()
    if is_last_working_day_of_month(today):
        print 'last working day'
    else:
        print 'not last working day'

if __name__ == '__main__':
    main()

requirement.txt

workdays
python-dateutil