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:yqj@fccs.com
"""
import datetime
import time

current = 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()