python 写出一年中每周的起始日期和终止日期

如果一月一号不在周一， 也认为该周为本年度第一周 而不是 年度的第一个周一为第一周

#!/usr/bin/env python# _#_ coding:utf-8 _*_"""#获取一年中每个星期的起始时间#author:[e-mail]"""import datetimeimport timecurrent = datetime.datetime.now()start = datetime.date(current.year,1,1)last_day = datetime.date(current.year,12,31)isfirst = start.weekday()last_week = last_day.strftime('%W')weeks={}if isfirst !=0:    end = datetime.timedelta(7-start.weekday()-1)    weeks[0]=[start,start+end]start += datetime.timedelta(7 - start.weekday())def print_date(i):    days = datetime.timedelta(weeks=i)    end = start + days #每周的开始时间        if  i+1 == int(last_week):   weeks[i+1] = [end,last_day]    else:weeks[i+1] = [end,end + datetime.timedelta(6)]def allweeks():    for i in range(0, int(last_week)):        print_date(i)    return weeks          def main():    allweeks()    for (k,week) in weeks.items():        num = k+1<=9 and "0"+str(k+1) or str(k+1)        print "%s\t%s\t%s\t" %(str(current.year)+num,str(week[0]),str(week[1]))if __name__ == "__main__":    main()