Python实现获取某天是某个月中的第几周

#!/usr/bin/env python
# -*- coding: utf-8 -*-
__author__ = '####'
 
import datetime
 
 
def get_week_of_month(year, month, day):
    """
    获取指定的某天是某个月中的第几周
    周一作为一周的开始
    """
    end = int(datetime.datetime(year, month, day).strftime("%W"))
    begin = int(datetime.datetime(year, month, 1).strftime("%W"))
    return end - begin + 1
 
if __name__ == '__main__':
    print get_week_of_month(2015, 1, 4)
    print get_week_of_month(2015, 1, 5)
    print get_week_of_month(2015, 1, 15)
    print get_week_of_month(2015, 1, 18)