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

# Author: SunGyo Kim
# Email: Kimsg1984@gmail.com
# irc.freenode #ubuntu-ko Sungyo

import calendar
import datetime

def calculate_workday(day):
    today = datetime.datetime.now()
    next_workday = today + datetime.timedelta(days=day)
    weekday = (today + datetime.timedelta(days=day)).isoweekday()
    if weekday > 5:
        return next_workday + datetime.timedelta(days=2)
    else:
        return next_workday

print(calculate_workday(3))
print(calculate_workday(4))
print(calculate_workday(5))
##############################
# 2017-12-21 17:27:37.734379
# 2017-12-22 17:27:37.734452
# 2017-12-25 17:27:37.734477
# [Finished in 0.0s]